WO2007148133A2 - Network selection - Google Patents
Network selection Download PDFInfo
- Publication number
- WO2007148133A2 WO2007148133A2 PCT/GB2007/050344 GB2007050344W WO2007148133A2 WO 2007148133 A2 WO2007148133 A2 WO 2007148133A2 GB 2007050344 W GB2007050344 W GB 2007050344W WO 2007148133 A2 WO2007148133 A2 WO 2007148133A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- access point
- user device
- network
- wireless user
- wireless
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
Definitions
- This invention relates to a method of network selection, in particular for wireless local area networks, such as IEEE 802.11.
- a wireless terminal needs to choose a network access point, such as an Access Point (AP) or Base Station (BS), to handover to, if mobility within the system is required, or change to a different network if the one it is currently with cannot provide the service it requires.
- AP Access Point
- BS Base Station
- Current IEEE 802.11 wireless systems support the periodic broadcast, or probing of network identity, and other characteristics, that can be used by mobile terminals (MTs) to detect network coverage and to assess which access point they would like to connect to having made their network selection.
- MTs mobile terminals
- a method of network selection for a wireless user device in radio communication with a first access point of one or more networks, via at least one of a plurality of access points comprising sending a network selection request from the wireless user device to the first access point; wherein if the network wishes to initiate a response from another access point in the same or another network, the first access point forwards the network selection request to one or more neighbouring access points, in the same or another network; wherein if any of the neighbouring access points is able to communicate with the user device, that neighbouring access point sends a response directly to the wireless user device; and wherein the wireless user device chooses the most suitable network from the responses sent.
- the present invention addresses the problem of the number of messages involved in an expanded system, by allowing the wireless user device to communicate with a single access point with which it is already in radio communication, to carry out subsequent selection of a network.
- the access point either provides the required level of service, or forwards the requirements to other neighbouring access points which reply to the wireless user device, only if they can satisfy the request. This way the number of messages from the user device is reduced and the user device may be able to obtain a service from an access point which is not immediately visible to it, due to restrictions having been placed on that access point, or the one which with the user device has a radio connection.
- a token provided by the wireless user device is attached to the network selection request before it is forwarded by the first access point to neighbouring access point.
- the network selection request includes requirements relating to the service that the wireless user device requires from any access point and its associated network.
- the associated network of the first access point forwards the network selection request to more than one neighbouring access point, in the same or another network, simultaneously.
- an access point that is able to communicate with the wireless user device responds directly to the wireless user device indicating the level of support that is available from the associated network of the access point for the service request from the wireless user device.
- the response is delivered via a unicast or multicast message delivery method, and includes the token provided by the wireless user device in the initial request.
- the wireless user device is one of a laptop, a personal digital assistant, or any wireless device supporting the appropriate air interface.
- Figure 1 illustrates a scenario showing the typical deployment of apparatus for carrying out the method of the present invention
- Figure 2 represents an example of a typical message flow between a wireless device and three access points using the method of the present invention.
- FIG. 3 illustrates the format of typical request and response messages used in the method of the present invention.
- the present invention addresses the problems which arise from user devices having to send large numbers of requests and receive corresponding responses over air, without any certainty that the access point with which the user device is communicating being able to provide the desired service.
- the user may have radio communication with the access point which had the strongest signal when the user device first switched on, or came within range, but that access point may be barred from the network which the user device needs, so the network request is passed on to another access point.
- the wireless communications may be unreliable, giving rise to the possibility that these requests and/or responses may get lost during transmission.
- This invention extends the standard procedures of request/response protocols to provide extra functionality in a more secure manner and to reduce the amount of over the air signalling for neighbour cell discovery.
- a wireless user device has to transmit multiple messages, covering all the possible channels within all possible neighbouring cells.
- the mechanism of the present invention allows the wireless device to send a message to its current access point, e.g. an AP, or BS, asking the access point to inform its neighbours whether the wireless device may possibly receive information from them directly. Typically, this is done through the reception of multicast frames.
- the wireless device attaches a unique token to this request, which is subsequently transmitted by any of the responding neighbour access points, enabling the original user device requesting the service to be identified and for the neighbouring access point to respond to it directly, without sending messages back through the first access point. In this manner, a closed loop information exchange is established between the wireless device and its neighbouring cells.
- Fig.1 shows a wireless device 1, or terminal, which transmits a request 2 to its current access point 3.
- This request 2 is processed by the network 4, which can be the same network for all 3 access points shown, or one or more of these access points may belong to a different network, and a response 5 may be transmitted through the access point 3, or neighbouring access point 5, 6 using responses 7, 8, or indeed all three of them, if deemed necessary by the network.
- Fig. 2 the message sequence is shown in more detail.
- the wireless device, or terminal 1 connects 11 in its usual manner to the access point 3, typically using key passing mechanisms, such as pairwise transient key (PTK) and group temporal key (GTK).
- the wireless device 1 transmits an inform message 12 to the access point 3, containing a locally generated unique token.
- Fig.3 a shows an example of the request 18 message content including the token and Fig.3b shows the same for the response 23 message content.
- the request message there is a header 19, token 20 and requests 21, 22 for information of type 1 and type 2.
- the response message 23 again there is a header 19 and token 20, along with blocks 24, 25 with information of type 1 and type 2 respectively.
- the inform message is forwarded 13, 14 by the access point 3 to the access points 5, 6.
- these access points 5, 6 decide that it is useful, or indeed possible, to transmit information back to the wireless device, they do so using either a unicast or multicast message 15, 16 including action or beacon and containing a suitable hash of the neighbouring access point identity (#BSSID) in a particular network (SSID), together with the token, so that the wireless device 1 can correctly identity the message and determine the identity of that neighbour access point 5, 6.
- the terminal can then associate with its preferred AP 5 after getting back the information, using the same message format as for the original connection 11, but with a different base station identified from the access point identifier, BSSID and the network identifier, SSID.
- This invention provides a considerable advantage to the standardisation of IEEE
- Additional functionality is provided to the system in two respects, firstly that closed group information is provided to the wireless terminal (i.e. information received may be based on its credentials); and secondly that closed group information is provided to the access points, allowing load balancing and filtering of traffic to the wireless device (i.e. policy control) and load balancing of existing wireless devices).
- Cross administrative domain information e.g. cross IEEE 802.11 SSID information
- cross IEEE 802.11 SSID information can be passed and managed.
- the network can also manage all the network access points within the potential pool, achieving load balancing which would not occur purely with neighbourhood reports (e.g. IEEE 802.1 lk/802.1 Iv).
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007262746A AU2007262746B2 (en) | 2006-06-23 | 2007-06-19 | Network selection |
CA2655603A CA2655603C (en) | 2006-06-23 | 2007-06-19 | Network selection |
CN2007800235185A CN101480082B (en) | 2006-06-23 | 2007-06-19 | Network selection |
EP07733765.7A EP2036380B1 (en) | 2006-06-23 | 2007-06-19 | Network selection |
US12/308,805 US8270409B2 (en) | 2006-06-23 | 2007-06-19 | Network selection |
JP2009517440A JP5135339B2 (en) | 2006-06-23 | 2007-06-19 | Network selection method |
MX2008016081A MX2008016081A (en) | 2006-06-23 | 2007-06-19 | Network selection. |
KR1020097001421A KR101421287B1 (en) | 2006-06-23 | 2007-06-19 | Network selection |
BRPI0713493-2 BRPI0713493B1 (en) | 2006-06-23 | 2007-06-19 | Network selection method for a user wireless device |
US13/601,859 US9025514B2 (en) | 2006-06-23 | 2012-08-31 | Network selection |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0612438.2 | 2006-06-23 | ||
GB0612438A GB0612438D0 (en) | 2006-06-23 | 2006-06-23 | Network selection |
GB0625367.8 | 2006-12-20 | ||
GB0625367A GB2439373A (en) | 2006-06-23 | 2006-12-20 | A Method for Network Edge Device Selection |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/308,805 A-371-Of-International US8270409B2 (en) | 2006-06-23 | 2007-06-19 | Network selection |
US13/601,859 Continuation US9025514B2 (en) | 2006-06-23 | 2012-08-31 | Network selection |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2007148133A2 true WO2007148133A2 (en) | 2007-12-27 |
WO2007148133A3 WO2007148133A3 (en) | 2008-02-21 |
Family
ID=36803749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2007/050344 WO2007148133A2 (en) | 2006-06-23 | 2007-06-19 | Network selection |
Country Status (16)
Country | Link |
---|---|
US (2) | US8270409B2 (en) |
EP (2) | EP2897420B1 (en) |
JP (1) | JP5135339B2 (en) |
KR (1) | KR101421287B1 (en) |
CN (1) | CN101480082B (en) |
AU (1) | AU2007262746B2 (en) |
BR (1) | BRPI0713493B1 (en) |
CA (1) | CA2655603C (en) |
ES (1) | ES2602102T3 (en) |
GB (2) | GB0612438D0 (en) |
MX (1) | MX2008016081A (en) |
PL (1) | PL2897420T3 (en) |
RU (1) | RU2434366C2 (en) |
UA (1) | UA96451C2 (en) |
WO (1) | WO2007148133A2 (en) |
ZA (1) | ZA200810461B (en) |
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US9025514B2 (en) | 2006-06-23 | 2015-05-05 | Nokia Solutions And Networks Gmbh & Co. Kg | Network selection |
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US20130254378A1 (en) * | 2011-09-16 | 2013-09-26 | Qualcomm Incorporated | Systems and methods for network quality estimation, connectivity detection, and load management |
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KR101631931B1 (en) | 2016-03-22 | 2016-07-04 | 한국해양과학기술원 | An optimized network selecting method among heterogeneous multi-band marine networks |
KR102109328B1 (en) * | 2016-05-03 | 2020-05-12 | 릴라이언스 지오 인포컴 리미티드 | Systems and methods for assigning at least one radio channel to an access point |
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KR101976827B1 (en) | 2018-10-18 | 2019-05-09 | 한국해양과학기술원 | A multi-band network selector error handling method and a recording medium thereof |
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- 2006-12-20 GB GB0625367A patent/GB2439373A/en not_active Withdrawn
-
2007
- 2007-06-19 PL PL15155060T patent/PL2897420T3/en unknown
- 2007-06-19 ES ES15155060.5T patent/ES2602102T3/en active Active
- 2007-06-19 EP EP15155060.5A patent/EP2897420B1/en active Active
- 2007-06-19 EP EP07733765.7A patent/EP2036380B1/en active Active
- 2007-06-19 KR KR1020097001421A patent/KR101421287B1/en active IP Right Grant
- 2007-06-19 AU AU2007262746A patent/AU2007262746B2/en active Active
- 2007-06-19 CN CN2007800235185A patent/CN101480082B/en active Active
- 2007-06-19 UA UAA200900474A patent/UA96451C2/en unknown
- 2007-06-19 US US12/308,805 patent/US8270409B2/en active Active
- 2007-06-19 MX MX2008016081A patent/MX2008016081A/en active IP Right Grant
- 2007-06-19 WO PCT/GB2007/050344 patent/WO2007148133A2/en active Application Filing
- 2007-06-19 RU RU2009102027A patent/RU2434366C2/en active
- 2007-06-19 JP JP2009517440A patent/JP5135339B2/en active Active
- 2007-06-19 CA CA2655603A patent/CA2655603C/en active Active
- 2007-06-19 BR BRPI0713493-2 patent/BRPI0713493B1/en active IP Right Grant
-
2008
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2012
- 2012-08-31 US US13/601,859 patent/US9025514B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
KR101421287B1 (en) | 2014-07-18 |
ES2602102T3 (en) | 2017-02-17 |
ZA200810461B (en) | 2009-12-30 |
US9025514B2 (en) | 2015-05-05 |
EP2036380B1 (en) | 2015-03-25 |
BRPI0713493A2 (en) | 2012-01-24 |
GB0625367D0 (en) | 2007-01-31 |
PL2897420T3 (en) | 2017-07-31 |
UA96451C2 (en) | 2011-11-10 |
RU2009102027A (en) | 2010-07-27 |
KR20090045200A (en) | 2009-05-07 |
EP2036380A2 (en) | 2009-03-18 |
US8270409B2 (en) | 2012-09-18 |
CA2655603C (en) | 2013-09-17 |
CN101480082A (en) | 2009-07-08 |
BRPI0713493B1 (en) | 2019-11-26 |
JP5135339B2 (en) | 2013-02-06 |
CN101480082B (en) | 2011-07-06 |
US20100014483A1 (en) | 2010-01-21 |
CA2655603A1 (en) | 2007-12-27 |
RU2434366C2 (en) | 2011-11-20 |
AU2007262746A1 (en) | 2007-12-27 |
US20130064222A1 (en) | 2013-03-14 |
MX2008016081A (en) | 2009-04-14 |
GB0612438D0 (en) | 2006-08-02 |
WO2007148133A3 (en) | 2008-02-21 |
GB2439373A (en) | 2007-12-27 |
EP2897420A1 (en) | 2015-07-22 |
EP2897420B1 (en) | 2016-08-17 |
JP2009542150A (en) | 2009-11-26 |
AU2007262746B2 (en) | 2012-01-19 |
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