CA2332392A1 - Method and apparatus for selecting an access point in a wireless network - Google Patents

Method and apparatus for selecting an access point in a wireless network Download PDF

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Publication number
CA2332392A1
CA2332392A1 CA002332392A CA2332392A CA2332392A1 CA 2332392 A1 CA2332392 A1 CA 2332392A1 CA 002332392 A CA002332392 A CA 002332392A CA 2332392 A CA2332392 A CA 2332392A CA 2332392 A1 CA2332392 A1 CA 2332392A1
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Prior art keywords
access point
detecting
link quality
access points
beacon
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Abandoned
Application number
CA002332392A
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French (fr)
Inventor
Walter Honcharenko
Peretz Moshes Feder
Haim Shalom Ner
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Nokia of America Corp
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Lucent Technologies Inc
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Publication of CA2332392A1 publication Critical patent/CA2332392A1/en
Abandoned legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06Hybrid resource partitioning, e.g. channel borrowing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point

Abstract

A method and apparatus for use in a wireless communications network searches for the best serving access point of a base station as a function of communication link quality and load levels, thereby allowing a subscriber terminal to react to changes in RF conditions and load levels. In one implementation, a wireless modem in a fixed wireless access network initiates an access point searching algorithm in response to a triggering condition, such as initially powering-up the subscriber terminal or degradation of communication link quality or load levels. After detecting beacons for a plurality of neighboring access points, the wireless modem selects the best access point as a function of communication link quality and relative load levels to maintain adequate service quality and to react to changes in load levels.
After an initial selection, the wireless modem may continually monitor quality/load conditions to determine whether to select a new access point.

Description

Feder 6-6-9 1 METHOD AND APPARATUS FOR SELECTING AN
ACCESS POINT IN A WIRELESS NETWORK
BACKGROUND OF THE INVENTION
1. Field of the Invention - The present invention relates to wireless communications, and more particularly to a technique for selecting an access point in a wireless network.
2. Description of Related Art Consumer demand for high-speed access to Internet and intranet related services and applications has resulted in several high-bandwidth access network alternatives, such as DSL (Digital Subscriber Line) broadband networks, all fiber networks, ISDN
(Integrated Services Digital Network), and fixed wireless networks.
Fixed wireless provides a viable alternative to traditional wire-based access, particularly in geographic regions..wlxere the ..:.
costs of upgrading and maintaining wireline connections are high.
Essentially, a fixed wireless network is a cellular network which relies on short-range transmitter/receiver ("transceiver") base stations to serve subscribers in small regions ("cells") of a larger service area. By dividing a service area into cells with limited range transceivers, the same frequencies can be reused in different regions of the service area, and subscriber terminals which consume relatively little power can be used to communicate with a serving base station.
Fig. 1 illustrates a conventional wireless Internet access system (WIAS), which is one specific implementation of fixed Feder 6-6-9 2 wireless technology having four major components: ( 1) multiple data base stations (BS) 100(a) and 100(b) which provide wireless connectivity and radio coverage to subscriber units 102(a)-(d) (for example, residential and corporate terminal equipment as illustrated in Fig. 1); (2) wireless modems ("WMs") 170(a)-(c) which allow the subscriber units 102(a)-(d) to communicate with BS
100(a) or 100(b) via forward (base station to subscriber) and reverse (subscriber to base station) air-interface links 115(a)-(c); (3) a data switching center (DSC) 125 for routing data packets to/from BS 100(a) and 100(b); and (4) a backbone transmission network 135, such as public IP (Internet Protocol) network, connected to the DSC 125.
Subscriber units may connect to the backbone transmission network 135 in various ways, examples of which are shown in Fig.
15- 1. Corporate terminals 102(c) and 102(d) are connected to the -backbone transmission net vork 135 via a -local:. area network (LAN), a wireless router and/or firewall (not shown), and a shared WM 170(c), while subscriber units 102(a) and 102(b) each have their own dedicated WM 170(a), 170(b). BS 100(a) and 100(b) may be directly connected to the DSC 125 or communicate with the DSC 125 via a service provider's private IP network 127.
Fig. 2 illustrates an exemplary cell pattern suitable for implementing fixed wireless access. As seen in Fig. 2, each BS
100(a) and 100(b) provides 360° RF service coverage to subscriber terminals in cells 150(a) and 150(b), respectively, by transmitting and receiving signals over air-interface channels in designated frequency blocks (e.g., 5 MHz wide transmit frequency blocks and Feder 6-6-9 3 S MHz receive frequency blocks). Typically, cell coverage is sectorized, such that the frequency block designated for a given cell is distributed among a plurality of sectors (e.g., for a five sector per cell configuration, each sector being assigned a 1 MHz block for transmitting and a lMHz block for receiving). Therefore, each BS
100(a) and (b) includes a plurality of access points ("APs", not shown in Fig. 1), one per sector.
Depending on the location of a subscriber's WM relative to cell/ sector boundaries and the radio frequency (RF) propagation characteristics of the surrounding area, the subscriber may be capable of communicating with multiple APs, i.e., multiple APs for a single cell and/or APs from different cells. For example, a subscriber's WM may be at or near the boundary of two or more sectors and/or two or more cells. In present implementations of fixed wireless access; the installer of the -subscriber's VIM selects a single AP during setup based on forward link signal strength,. and ; : .
the assignment of the AP which transmits/receives to/from the subscriber's WM does not change.
Due to changing RF propagation characteristics of the surrounding area, however, the AP which provides the best performance during installation will often not always be the best or even a suitable AP for ensuring adequate service quality or data throughput rates. For example, temperature and climatic changes, particularly moisture levels which change reflection coefficients, can significantly affect RF propagation between the AP and a subscriber's WM. Furthermore, degradation of service may result if the AP assigned to the user temporarily fails, or the sector served Feder 6-6-9 4 by the AP becomes overloaded. Still further, a more suitable AP
may be subsequently deployed by the service provider (e.g., as a result of growth and "cell-splitting").
Therefore, the need exists for an agile AP selection and assignment technique which allows a subscriber's WM to select and switch between serving APs in response to network conditions.
SUMMARY OF THE INVENTION
The present invention is a method- and ~ apparatus for selecting an access point in a wireless communications network which is able to maintain adequate service quality and throughput rates under dynamic network conditions. In one embodiment, the present invention is a technique for selecting and assigning an access point in a fixed wireless network which monitors control signals transmitted by a plurality of neighboring access points and selects the best access point as a function of a communication link quality metric, such as signal-strength at the useF location, signal -- -quality at the user location, signal strength at the access point, signal quality at the access point, packet error rate ("PER") at the wireless modem, PER at the access point, or a combination of two or more of these measurements, and relative sector load levels.
By dynamically selecting the best serving access point as a function of the communication link quality metric and relative load levels, the subscriber's wireless modem is able to adapt to changing RF propagation characteristics of the surrounding area to maintain high service quality and throughput rates, and is also able to avoid service outages by directing traffic away from a failed or overloaded access point.

Feder 6-6-9 5 In one exemplary implementation, a wireless modem in a fixed wireless network executes an AP search/selection sequence in response to a triggering event, such as when the wireless modem is initially powered-up, when service quality degrades below a threshold level, when sector load exceeds a threshold, or when instructed by the serving AP to do so, to (re)select an access point. When a triggering event has occurred, the subscriber's wireless modem detects an access control signal, commonly referred to as a "beacon", transmitted from a plurality of neighboring access points. An access point's beacon identifies the access point, includes a neighbor list to identify neighboring access points and the frequency channel on which such neighboring access points are transmitting, and includes a field which indicates the access point's load level. After detecting beacons and obtaining a communication link quality metric for each neighboring access -point, the wireless modem selects the best access point based on - . ....
the communication link quality metric and relative load levels.
By considering relative load levels, adequate throughput rates can be maintained by distributing service among a greater number of access points when possible (i.e., achieving load balancing). Furthermore, by initiating access point re-selection when service quality degrades below a threshold level, or when sector load exceeds a threshold, the subscriber's wireless modem is able to react to changes in RF propagation conditions in the surrounding area, such as temperature and other climatic changes which affect communication quality.

Feder 6-6-9 BRIEF DESCRIPTION OF THE. DRAWINGS
The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings, wherein like elements are represented by like reference numerals, which are given by way of illustration only and thus are not limitative of the present invention, and wherein:
Fig. 1 illustrates an exemplary wireless Internet access configuration system which is one suitable environment for implementing embodiments of the present invention;
Fig. 2 illustrates an exemplary cell pattern layout for a fixed wireless access network;
Fig. 3A generally illustrates an exemplary base station configuration suitable for implementing embodiments of the present invention;
Fig. 3B generally illustrates an - exemplary subscriber terminal configuration suitable for implementing embodiments of the present invention;
Fig. 4 is a block diagram depicting select components of a wireless modem in accordance with an embodiment of the present invention;
Fig. 5 is a block diagram depicting select components of an access point in accordance with the preferred embodiment; and Fig. 6 is a flow diagram for an access point search/selecting sequence according to an embodiment of the present invention.
DETAILED DESCRIPTION
The present invention is a method and an apparatus for (re)selecting an AP in a wireless communications environment, Feder 6-6-9 such as a fixed wireless access network. In one embodiment, the present invention is implemented as a search algorithm performed by a subscriber's WM to dynamically select an AP as a function of relative communication link quality and load levels to maintain adequate performance and data throughput rates, even when RF
propagation characteristics of the service area change and/or AP
failure or overload occurs. An embodiment of the present invention will be described with reference to Figs. 3A; 3B, and 4-6.
Initially, exemplary base station and subscriber terminal architectures will be described. Although specific base station and subscriber terminal configurations are detailed below, it should be recognized that such details are for illustration purposes and that the present invention may be implemented in various wireless network configurations.
Fig. 3A generally illustrates an exemplary base station suitable for use in accordariee :with an embodiment of the -present invention. In Fig. 3A, a base station 200 includes a wireless hub 205 and at least one AP 210. Preferably, the base station 200 includes five APs 210( 1-5) for serving five sectors of 72° coverage each. Assuming each base station in the network service area is assigned the same 5 MHz wide spectrum blocks for transmitting and receiving, each of the five APs 210(1-5) is assigned a different 1 MHz channel for transmitting and a separate 1 MHz channel for receiving.
Wireless hub 205 is preferably a signal router and power supply that supplies each AP 210 with voltage and data (for example, 48V DC and standard lOBase-T LAN data) through Feder 6-6-9 8 cables 211(1-5), such as lOBase-T cables. All radio and signal processing functions (i.e., transmitting and receiving for BS 200) are performed by the APs 210( 1-5). Further, the wireless hub 205 provides connections 213(1-4) to/from the DSC (not shown).
S Fig. 3B generally illustrates an exemplary subscriber terminal configuration 202 suitable for use in accordance with an embodiment of the present invention. The subscriber terminal 202 includes a WM 270, an interface adapter box 275, and a power supply 280 (for example, a 24V DC power supply). The WM 270 is preferably attached to a subscriber's home or office near the rooftop to communicate with a selected AP 210. A PC 290 is connected to the interface adapter box 275 to send/receive data using the WM 270, e.g., via an ethernet hub 295 and a lOBase-T
cable 296 for implementation in a LAN environment.
~ S Both the WM 270 and the AP 210 - have radio units with receiver and transmitter circuitry; each providing respective transmit and receive functions. A reverse link (subscriber to base station) signal transmitted from the WM 270 to the AP 210 preferably operates in a 1 MHz RF channel between approximately 3450-3500 MHz, whereas a forward link (base station to subscriber) signal transmitted from the AP 210 to the WM 270 preferably occupies a 1 MHz RF channel between approximately 3550-3600 MHz. Further, both radio units have an automatic gain control (AGC) function to provide linear demodulation over a wide dynamic range; a receive signal strength indication (RSSI) function to enable digital control of the AGC and for use in the AP search algorithm discussed below; and both radio units perform Feder 6-6-9 9 modulation and demodulation, for example using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM) techniques.
Fig. 4 is a block diagram depicting an exemplary architecture of the WM 270. In the exemplary configuration of Fig. 4, the WM
270 includes: (1) a WM antenna 281; (2) a radio board 251; (3) a digital board 261; (4) a power supply 271; and (5) an interface 264.
The radio board 251 converts RF signals received from an AP 210 via the WM antenna 281 to digital signals, and converts digital transmit signals to analog RF signals which are then transmitted by the WM antenna 281. The radio board 251 includes an analog RF/ IF processing unit 252 which performs such analog/ digital conversion, and which down-converts signals received by the WM
antenna 281 to an intermediate frequency (IF) signal. The radio board also includes a digital signal processor (DSP) 253 which demodulates the ~IF sigzials output by"the'analog RF/IF processingw unit 252. The DSP 253 also modulates signals received from the digital board 261 to be transmitted, the modulated signals then being up-converted to RF signals by the analog RF/IF processing unit 252.
The digital board 261 includes a control processor 262 which provides medium access control (MAC) and protocol functions, such as the timing of data transmissions. As discussed in greater detail below, the control processor 262 also executes an AP
search/select algorithm according to an embodiment of the present invention. The digital board 261 also includes a format converter 263 which converts the MAC format data output by the control Feder 6-6-9 10 processor 262 to a data stream, such as a standard lOBase-T data stream, for output to the subscriber's PC 290 (not shown) via an interface 264. The power supply 271 supplies power to the power radio board 251 and the digital board 261.
Fig. 5 is block diagram of an exemplary architecture of the AP 210 which is suitable for use in accordance with the present invention. In the exemplary configuration of Fig. 5, the AP 210 includes: (1) a horizontally polarized antenna 282; (2) a vertically polarized antenna 281; (3) a matrix board 241; (4) an RX/TX board pair 221; (5) a TX board pair 231; and (6) a power supply/hub board 212.
Like the WM 270 of Fig. 4, the AP 210 includes respective radio and digital boards which perform the functions discussed above. The AP 210 has both a receiving/transmitting (RX/TX) board pair 221 and a transmission (TX) board pair 231; each-having respective radio boards 222 and 232~'and digital boards 223 and 233. Radio boards 222, 232 each include an analog RF/IF
processing unit 224, 234 and a DSP 226, 236, and each digital board 223, 233 includes a control processor 225, 235 and a format converter 227, 237.
The RX/TX board pair 221 transmits and receives when the AP 210 is used in a half duplex mode (i.e., the AP uses only one board to perform sequential transmit and receive functions), and functions like radio and digital boards 251 and 261 of the WM 270 described above. The TX board pair 231 is used to transmit when the AP 210 is used in full duplex mode (i.e., when the AP is transmitting and receiving simultaneously).

Feder 6-6-9 11 The matrix board 241 selects the desired board pair for transmission and/or reception and the best antenna for reception (the vertically polarized antenna 281 or the horizontally polarized antenna 282) via switches 242 and 244. A duplexer 243 isolates receive and transmit frequencies on the vertically polarized antenna 281, while a separate receive filter (not shown) filters the signals received from the horizontally polarized antenna 282.
Signals are always transmitted on the vertically polarized antenna 281, whereas reception of signals occurs at both antennas, with the RX/TX board pair 221 determining which of the two signals to select based on performance. The power supply/hub board 212 includes a power supply 214 for providing power to the radio boards 222, 232, the digital boards 223, 233, and the matrix board 241, and an ethernet hub 213 for sending/receiving data streams to/from the digital boards 223, 233.
._ The operatiom'of an AP se'arch/~election technique accordvingv to an embodiment of the present invention will next be described with reference to the flow diagram of Fig. 6. The AP
search/ selection described below with reference to Fig. 6 can be per. formed by the control processor 262 of the WM 270.
The WM 270 performs a AP search/selection sequence upon determining that a triggering event has occurred. A number of different occurrences may constitute a triggering event. For example, the WM 270 may perform AP search/selection each time the subscriber's terminal is powered-up, at predetermined time intervals, when a deterioration of service quality or an increased load level is detected, or as instructed by a previously selected AP.

Feder 6-6-9 12 When the AP search/selection is initiated (step 402),_ the subscriber's WM 270 selects an initial RF channel to search for APs (Step 404). Because the same frequencies are used throughout the wireless network region, only a limited number of channels are available. The WM 270 may select any possible frequency channel within a search range as the initial RF channel (e.g., the lowest frequency channel or the highest frequency channel).
Each frame transmitted by an AP includes access control information, commonly referred to as a "beacon." In accordance with the present invention, each beacon identifies the transmitting AP, indicates the load level for the AP, and includes a neighbor list to identify a number of (e.g., 8) neighboring APs and the channels on which each neighboring AP is transmitting. The beacon may further include control information, such as data packet acknowledgements ("ACKs"). The WM 270 attempts to detect a beacon 'transmitted by an AP on the iriitial RF channel (step 406). _:
When a beacon is found on the selected channel (step 408), the WM 270 extracts the neighbor list from the detected beacon (step 410) to identify neighboring APs and their assigned channels.
Using the extracted neighbor list information, the WM 270 detects the beacons from each neighboring AP (step 412).
If the WM 270 does not detect a beacon on the assigned RF
channel within a predetermined time period, e.g., 10 seconds (step 418), a new RF channel is selected (step 420). If the newly selected RF channel is within the channel search range (step 422), the WM
270 attempts to detect beacons on the newly selected channel (step 406). If the newly selected RF channel is not within the channel Feeler 6-6-9 13 search range (i.e., is higher/lower than the highest/lowest channel in the search range), the WM 270 re-selects the initial RF channel (step 404) for attempted beacon detection (step 406).
After retrieving a neighbor list from a detected beacon at step 410 and detecting beacons from neighboring APs (step 412), the WM 270 determines if there is at least one acceptable AP based on a communication link quality metric (step 413), and, if so, selects a single AP based on the communication link quality metric and relative AP load levels (step 414). The communication link quality metric can be one of signal strength at the WM 270 (e.g., RSSI), signal quality at the WM 270, signal strength at the AP 210, and signal quality at the AP 210, or a combination of two or more of these measurements. Signal quality can be represented by any number of measurements, including signal-to-noise ratio, bit error rate, frame error rate, packet acknowledgement percentage (i.e., the percentage of transmitted packageswvhich ~.re acknowledged);
etc.
Signal strength/quality at the WM 270 indicates forward link quality, while signal strength/quality at the AP 210 indicates reverse link quality. One or more measurements which indicate forward link quality and one or more measurements which indicate reverse link quality can be combined to obtain a communication link quality metric which represents communication link quality in both forward and reverse directions (i.e., bi-directional link quality). If no AP has an acceptable communication link quality metric (step 413), the WM 270 reinitiates the AP search/selection (step 402).

Feder 6-6-9 14 Relative AP load levels are also considered at step 414 to select the best AP. For example, if the AP with the highest communication link quality metric also has a load level which is below a threshold, that AP is selected. If each AP having an acceptable communication link quality metric also has a load level which exceeds the threshold, then the AP with the best communication link quality metric is selected. If some of the APs which have an acceptable communication link quality metric have a load level which exceeds the threshold but at least one such AP
has a load level which is below the threshold, the AP with the lowest load level is selected. Load level may be represented by any number of measurements. For example, the average data throughput per user multiplied by the number of users can be calculated at the AP 210. Other measurements, such the average number of bits being transmitted by the AP 210 per second, the "CPU up-time" at the hub, -a.ndyor -data buffer overflow 'conditions; ~ -can be monitored to indicate load.
After the WM 270 has assigned the best AP at step 414, subsequent changes in service quality and/or load levels my cause the WM 270 to re-enter the AP search/selection sequence described above. For example, deteriorating forward link quality may cause the WM 270 to perform AP search/section (step 426).
Also, the previously selected AP may explicitly instruct the WM 270 to perform the AP search/selection sequence, for example if reverse link quality drops below a threshold. Furthermore, the WM 270 may continuously or periodically monitor the load level for the serving AP and perform AP search/selection when the load level Feder 6-6-9 1 S
exceeds a threshold (step 428). If the WM 270 performs AP
search/selection based on degraded service quality or an excessive load level for the previously selected AP (or if instructed by the AP
to do so), the WM 270 uses the neighbor list received in the beacon of the previously selected AP to detect the beacons for neighboring APs (step 412) so that the best AP may be selected (step 414).
By implementing the above-described AP search/selection sequence, WMs may switch between APs based on local per. formance, which can change as a result of changing RF
propagation conditions, signal levels, load levels, and network redesign. Furthermore, a subscriber's WM can select a new AP to avoid temporary service outages by directing traffic away from a failed or overloaded AP.
It should be apparent to those skilled in the art that various modifications and applications of the present invention are _. contemplated which may be realized without departing from the spirit and scope of the present invention. As one example, the subscriber terminal may include a mechanical control mechanism which positions the WM antenna 281. In this way, when a new AP
is selected, the WM antenna 281 may be re-oriented to improve communication link quality for the newly-selected AP.
Furthermore, the WM antenna 281 may be controlled to scan for beacons during the AP search/selection when determining the communication link quality metric for each AP in the neighbor list, so that the selection accuracy is improved. Furthermore, although the above-described embodiment specifies that the control processor of the WM 270 performs AP search/selection, it should Feder 6-6-9 16 be understood that the AP search/selection sequence and portions thereof can be implemented in any number of software-driven processing circuitry, application specific integrated circuits, or other arrangements. Still further, although the above-described embodiment specifies that the wireless modem obtains a neighbor list from a detected beacon, the wireless modem may obtain the neighbor list independent of a beacon.

Claims (26)

Claims
1. A method of selecting an access point in a wireless communications network, comprising:
detecting access channel information ("beacons") from a plurality of access points of one or more base stations, each beacon indicating a load level associated with the corresponding access point; and selecting a single access point as a function of the relative load levels associated with the plurality of access points.
2. The method of claim 1, wherein said step of selecting a single access point considers communication link quality associated with each of the plurality of access points.
3. The method of claim 2, wherein communication link quality is forward link quality.
4. The method of claim 2, wherein communication link quality is reverse link quality.
5. The method of claim 1, wherein said step of detecting beacons from a plurality of access points is initiated when a load level associated with a currently serving access point exceeds a threshold.
6. The method of claim 1, wherein said step of detecting beacons from a plurality of access points is initiated when communication link quality for a currently serving access point degrades below a threshold.
7. The method of claim 1, wherein said step of detecting beacons includes obtaining a neighbor list indicating radio frequency channels associated with a plurality of neighboring access points.
8. The method of claim 1, wherein said step of detecting beacons from a plurality of access points includes:
detecting a beacon of an access point on a selected radio frequency search channel;
obtaining a neighbor list from the detected beacon, the neighbor list indicating radio frequency channels associated with a plurality of neighboring access points; and detecting a beacon of each of the neighboring access points on the radio frequency channels indicated in the neighbor list.
9. The method of claim 8, wherein said step of detecting a beacon includes:
setting an initial radio frequency search channel;
determining whether a beacon can be detected on the initial radio frequency search channel; and setting an updated frequency search channel, within an acceptable range of search channels, wherein said step of setting an updated frequency search channel is repeated until a beacon can be detected.
10. The method of claim 1, wherein said wireless communications network is a fixed wireless access network.
11. The method of claim 10, wherein said steps of detecting beacons and selecting a single access point are performed by a wireless modem of the fixed wireless access network.
12. The method of claim 11, wherein said step of detecting beacons from a plurality of access points is initiated when the wireless modem is powered-up.
13. The method of claim 2, wherein communication link quality is determined by receive signal strength measurements and/or signal quality measurements.
14. An apparatus for selecting an access point in a wireless communications network, comprising:
detecting means for detecting access channel information ("beacons") from a plurality of access points of one or more base stations, each beacon indicating a load level associated with the corresponding access point; and selecting means for selecting a single access point as a function of the relative load levels associated with the plurality of access points.
15. The apparatus of claim 14, wherein said selecting means considers communication link quality associated with each of the plurality of access points when selecting the single access point.
16. The apparatus of claim 15, wherein communication link quality is forward link quality.
17. The apparatus of claim 15, wherein communication link quality is reverse link quality.
18. The apparatus of claim 14, wherein said detecting means initiates detecting beacons from a plurality of access points when a load level associated with a currently serving access point exceeds a threshold.
19. The apparatus of claim .14, wherein said detecting means initiates detecting beacons from a plurality of access points when communication link quality for a currently serving access point degrades below a threshold.
20. The apparatus of claim 14, wherein said detecting means detects beacons by obtaining a neighbor list indicating radio frequency channels associated with a plurality of neighboring access points.
21. The apparatus of claim 14, wherein said detecting means detects beacons from a plurality of access points by:
detecting a beacon of an access point on a selected radio frequency search channel;
obtaining a neighbor list from the detected beacon, the neighbor list indicating radio frequency channels associated with a plurality of neighboring access points; and -detecting a beacon of each of the neighboring access points on the radio frequency channels indicated in the neighbor list.
22. The apparatus of claim 21, wherein said detecting means detects a beacon by:
setting an initial radio frequency search channel;
determining whether a beacon can be detected on the initial radio frequency search channel; and setting an updated frequency search channel, within an acceptable range of search channels, wherein setting an updated frequency search channel is repeated until a beacon can be detected.
23. The apparatus of claim 14, wherein said wireless communications network is a fixed wireless access network.
24. The apparatus of claim 23, wherein said apparatus is a wireless modem of the fixed wireless access network.
25. The apparatus of claim 24, wherein said detecting means initiates detecting beacons from a plurality of access points when said wireless modem is powered-up.
26. The apparatus of claim 15, wherein communication link quality is determined by receive signal strength measurements and/or signal quality measurements.
CA002332392A 2000-03-08 2001-01-26 Method and apparatus for selecting an access point in a wireless network Abandoned CA2332392A1 (en)

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Families Citing this family (163)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037047A1 (en) 1998-01-16 1999-07-22 Symbol Technologies, Inc. INFRASTRUCTURE FOR WIRELESS LANSs
US6965948B1 (en) * 1999-11-12 2005-11-15 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for selective network access
US7173922B2 (en) 2000-03-17 2007-02-06 Symbol Technologies, Inc. Multiple wireless local area networks occupying overlapping physical spaces
US7173923B2 (en) * 2000-03-17 2007-02-06 Symbol Technologies, Inc. Security in multiple wireless local area networks
US6928280B1 (en) * 2000-03-20 2005-08-09 Telephia, Inc. Method and system for measuring data quality of service in a wireless network using multiple remote units and a back end processor
US6985465B2 (en) * 2000-07-07 2006-01-10 Koninklijke Philips Electronics N.V. Dynamic channel selection scheme for IEEE 802.11 WLANs
FI113319B (en) * 2000-09-29 2004-03-31 Nokia Corp Selection of a service producing network element in a telecommunication system
US7143171B2 (en) * 2000-11-13 2006-11-28 Telefonaktiebolaget Lm Ericsson (Publ) Access point discovery and selection
US7551562B2 (en) * 2000-12-29 2009-06-23 Tropos Networks Determining bidirectional path quality within a wireless mesh network
EP1257092B1 (en) * 2001-05-08 2005-01-05 Agere Systems Guardian Corporation Dynamic frequency selection in a wireless LAN with channel swapping between access points
US7738407B2 (en) 2001-08-03 2010-06-15 At&T Intellectual Property Ii, L.P. Method and apparatus for delivering IPP2T (IP-push-to-talk) wireless LAN mobile radio service
US7307963B2 (en) 2001-08-03 2007-12-11 At&T Corp. Architecture and method for using IEEE 802.11-like wireless LAN system to emulate private land mobile radio system (PLMRS) radio service
GB0120033D0 (en) * 2001-08-16 2001-10-10 Fujitsu Ltd Cell selection
US7143149B2 (en) * 2001-09-21 2006-11-28 Abb Ab Dynamic operator functions based on operator position
JP2003134031A (en) * 2001-10-23 2003-05-09 Oki Electric Ind Co Ltd Communication device
US7064740B2 (en) * 2001-11-09 2006-06-20 Sharp Laboratories Of America, Inc. Backlit display with improved dynamic range
US7406319B2 (en) * 2001-11-19 2008-07-29 At&T Corp. WLAN having load balancing by access point admission/termination
US7840221B1 (en) 2001-11-19 2010-11-23 At&T Intellectual Property Ii, L.P. WLAN having load balancing by beacon power adjustments
US7400901B2 (en) 2001-11-19 2008-07-15 At&T Corp. WLAN having load balancing based on access point loading
US7149196B1 (en) * 2002-01-11 2006-12-12 Broadcom Corporation Location tracking in a wireless communication system using power levels of packets received by repeaters
US7672274B2 (en) 2002-01-11 2010-03-02 Broadcom Corporation Mobility support via routing
US7876704B1 (en) 2002-01-11 2011-01-25 Broadcom Corporation Tunneling protocols for wireless communications
US7515557B1 (en) * 2002-01-11 2009-04-07 Broadcom Corporation Reconfiguration of a communication system
US6788658B1 (en) * 2002-01-11 2004-09-07 Airflow Networks Wireless communication system architecture having split MAC layer
JP3946059B2 (en) * 2002-03-06 2007-07-18 株式会社エヌ・ティ・ティ・ドコモ Mobile station, communication system and communication method
US20030191856A1 (en) * 2002-04-08 2003-10-09 Paul Lewis Wireless networking with dynamic load sharing and balancing
US7113498B2 (en) 2002-06-05 2006-09-26 Broadcom Corporation Virtual switch
US7610050B2 (en) * 2002-08-14 2009-10-27 Tadaaki Chigusa System for mobile broadband networking using dynamic quality of service provisioning
US20060171335A1 (en) * 2005-02-03 2006-08-03 Michael Yuen Backup channel selection in wireless LANs
JP3845347B2 (en) 2002-08-28 2006-11-15 Necインフロンティア株式会社 High speed roaming method
US8116285B1 (en) * 2002-09-19 2012-02-14 Hewlett-Packard Development Company, L.P. Intelligent wireless access point selection
US6928283B2 (en) * 2002-09-20 2005-08-09 Interdigitial Technology Corporation Method and system for improved beacon acquisition performance with time slot and antenna sector reuse
US7606573B1 (en) 2002-09-27 2009-10-20 Autocell Laboratories, Inc. Wireless switched network
US20060153133A1 (en) * 2002-12-11 2006-07-13 Koninklijke Philips Electronics N.V. System and method for performing a fast handoff in a wireless local area network
JP2004207839A (en) 2002-12-24 2004-07-22 Nec Corp Wireless resource management system, method thereof, management apparatus used for the same, base station, and terminal
US6873611B2 (en) * 2002-12-31 2005-03-29 Nextwlan Corporation Multiprotocol WLAN access point devices
BRPI0406649A (en) * 2003-01-09 2005-12-06 Thomson Licensing Sa Method and apparatus for grouping multiple access points
US20040156372A1 (en) * 2003-02-12 2004-08-12 Timo Hussa Access point service for mobile users
US20050070263A1 (en) * 2003-02-24 2005-03-31 Floyd Backes Wireless access point protocol logic
US7590708B2 (en) 2003-02-24 2009-09-15 Qualcomm, Incorporated Wireless local access network system detection and selection
US7869822B2 (en) * 2003-02-24 2011-01-11 Autocell Laboratories, Inc. Wireless network apparatus and system field of the invention
US7146130B2 (en) 2003-02-24 2006-12-05 Qualcomm Incorporated Wireless local access network system detection and selection
JP3632025B2 (en) * 2003-02-26 2005-03-23 Tdk株式会社 Thin film magnetic head, head gimbal assembly, and hard disk drive
US20040185845A1 (en) * 2003-02-28 2004-09-23 Microsoft Corporation Access point to access point range extension
TW200420025A (en) * 2003-03-25 2004-10-01 Gemtek Technology Co Ltd Wireless network architecture
JP4136771B2 (en) 2003-04-23 2008-08-20 キヤノン株式会社 COMMUNICATION SYSTEM, COMMUNICATION DEVICE, ITS CONTROL METHOD, AND COMPUTER PROGRAM
JP4125172B2 (en) * 2003-04-23 2008-07-30 キヤノン株式会社 Wireless communication system, wireless communication apparatus, control method therefor, and computer program
JP4125173B2 (en) 2003-04-23 2008-07-30 キヤノン株式会社 Information processing apparatus connection control method, information processing apparatus, and computer program
US7447176B2 (en) * 2003-06-03 2008-11-04 Microsoft Corporation Making roaming decisions based on association qualities between wireless devices and wireless access points
JP2006527524A (en) * 2003-06-06 2006-11-30 メッシュネットワークス インコーポレイテッド System and method for characterizing link quality in a wireless network
US7512689B2 (en) * 2003-07-02 2009-03-31 Intel Corporation Plug and play networking architecture with enhanced scalability and reliability
DE602004013592D1 (en) 2003-07-11 2008-06-19 Qualcomm Inc DYNAMIC COMMONLY USED FORWARD CARD
DK1652393T3 (en) * 2003-07-17 2009-12-07 Interdigital Tech Corp Method and system for providing auxiliary data
US7376087B2 (en) * 2003-08-13 2008-05-20 Tropos Networks, Inc. Method and apparatus for monitoring and displaying routing metrics of a network
US8738023B2 (en) 2003-09-23 2014-05-27 Agere Systems Llc Method and apparatus for automatic determination of optimal user device location in a wireless network
KR20050034342A (en) * 2003-10-09 2005-04-14 삼성전자주식회사 Wireless network system and method of registering station
US7092353B2 (en) * 2003-10-17 2006-08-15 Qualcomm Incorporated Carrier search methods and apparatus
US7412542B1 (en) * 2003-11-26 2008-08-12 Microsoft Corporation Bridging a gaming console with a wireless network
US7652995B2 (en) * 2003-12-19 2010-01-26 International Business Machines Corporation Autonomic reassociation of clients in a wireless local area network
US20050135310A1 (en) * 2003-12-19 2005-06-23 International Business Machines Corporation Autonomic client reassociation in a wireless local area network
US7936676B2 (en) * 2003-12-19 2011-05-03 Lenovo (Singapore) Pte. Ltd. Autonomic load balancing in wireless local area networks
US7738876B1 (en) 2004-01-16 2010-06-15 Qualcomm Incorporated Radio resource management for wireless local area networks
US7366169B1 (en) 2004-02-18 2008-04-29 Autocell Laboratories, Inc. Apparatus for scanning radio frequency channels
JP2005244525A (en) * 2004-02-25 2005-09-08 Fujitsu Ltd Communication system
EP2618597B1 (en) 2004-03-02 2015-01-14 Panasonic Intellectual Property Corporation of America Negotiation of functions between wireless access point and control node
JP4475639B2 (en) * 2004-04-14 2010-06-09 キヤノン株式会社 Wireless terminal apparatus, control method thereof and communication control method
US8014804B2 (en) * 2004-05-04 2011-09-06 Agere Systems Inc. Associating a wireless station with an access point
KR100549530B1 (en) 2004-05-20 2006-02-03 삼성전자주식회사 Computer, access point, network system and control method thereof
US7962148B2 (en) * 2004-07-20 2011-06-14 Qualcomm Incorporated Controlling and managing access to multiple networks
JP2008508773A (en) * 2004-07-30 2008-03-21 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ System and method for load balancing in a wireless LAN
US20060059043A1 (en) * 2004-09-14 2006-03-16 Chan Wesley T Method and system to provide wireless access at a reduced rate
US8666816B1 (en) * 2004-09-14 2014-03-04 Google Inc. Method and system for access point customization
US20060058019A1 (en) * 2004-09-15 2006-03-16 Chan Wesley T Method and system for dynamically modifying the appearance of browser screens on a client device
BRPI0419085B1 (en) * 2004-10-20 2018-05-02 Thomson Licensing WIRELESS MOBILE TERMINAL ACCESS METHOD BASED ON ACCESS POINT SERVICES AND SERVICE PARAMETERS
US20060171305A1 (en) * 2005-02-03 2006-08-03 Autocell Laboratories, Inc. Access point channel forecasting for seamless station association transition
US20060171304A1 (en) * 2005-02-03 2006-08-03 Hill David R WLAN background scanning
US7480264B1 (en) * 2005-02-10 2009-01-20 Sonicwall, Inc. Centralized wireless LAN load balancing
US20060182023A1 (en) * 2005-02-15 2006-08-17 Yigal Bejerano Methods and devices for iteratively determining mobile device-to-access point associations to achieve load balancing
DE602006014373D1 (en) * 2005-03-14 2010-07-01 Koninkl Philips Electronics Nv METHOD AND SYSTEM FOR NOTIFYING ACCESS POINT CANDIDATES IN A WIRELESS NETWORK
US7676231B2 (en) * 2005-04-13 2010-03-09 Intel Corporation Methods and apparatus for selecting communication channels based on channel load information
US20060246901A1 (en) * 2005-04-27 2006-11-02 Nokia Corporation Supporting a decision by a mobile terminal whether to use an available access point
US20060264212A1 (en) * 2005-05-20 2006-11-23 Ramesh Sekhar Method and system for a roam-less mobile unit
KR20060124244A (en) * 2005-05-31 2006-12-05 삼성전자주식회사 Wireless communication system using bluetooth in manufacturing equipment
CN100459795C (en) * 2005-06-15 2009-02-04 华为技术有限公司 Method for selecting service node according to load status
US7515544B2 (en) 2005-07-14 2009-04-07 Tadaaki Chigusa Method and system for providing location-based addressing
KR100739725B1 (en) * 2005-08-29 2007-07-13 삼성전자주식회사 Method and apparatus for fast and efficient handover at link layer of wireless LAN
JP4832848B2 (en) * 2005-10-13 2011-12-07 パナソニック株式会社 Wireless access point selection method, wireless device, wireless terminal, and computer program
KR100678699B1 (en) 2005-10-19 2007-02-05 에스케이 텔레콤주식회사 Method and system for providing remote control function of beacon module
US8411616B2 (en) 2005-11-03 2013-04-02 Piccata Fund Limited Liability Company Pre-scan for wireless channel selection
KR100743835B1 (en) * 2005-11-11 2007-07-30 (재)대구경북과학기술연구원 Improving method of over-traffics in wireless lan network
KR100749848B1 (en) * 2005-11-11 2007-08-16 한국전자통신연구원 Apparatus and method for channel scanning in portable internet system
US8478300B2 (en) 2005-12-20 2013-07-02 Microsoft Corporation Proximity service discovery in wireless networks
US8559350B2 (en) 2005-12-20 2013-10-15 Microsoft Corporation Mechanism to convey discovery information in a wireless network
US7613426B2 (en) 2005-12-20 2009-11-03 Microsoft Corporation Proximity service discovery in wireless networks
KR100735811B1 (en) * 2006-01-18 2007-07-06 기가 바이트 테크놀러지 컴퍼니 리미티드 Method of automatically establishing distributed network of a plurality of access points
DE102006008463A1 (en) * 2006-02-17 2007-08-23 Kaco Gmbh + Co. Kg Test device for detecting the vapor emission at at least one leakage point, preferably in mechanical seals, in particular in the automotive sector
US8170546B2 (en) * 2006-03-22 2012-05-01 Broadcom Corporation Client device characterization of other client device transmissions and reporting of signal qualities to access point(s)
JP2007300369A (en) * 2006-04-28 2007-11-15 Toshiba Corp Information processor and connection control method
US20070264991A1 (en) * 2006-05-15 2007-11-15 Microsoft Corporation Services near me: discovering and connecting to available wireless services utilizing proximity discovery
US10681151B2 (en) 2006-05-15 2020-06-09 Microsoft Technology Licensing, Llc Notification framework for wireless networks
KR100768753B1 (en) * 2006-07-10 2007-10-19 삼성전자주식회사 Method for scanning of access point in portable communication terminal
US8849297B2 (en) * 2006-07-14 2014-09-30 Qualcomm Incorporated Call establishment and maintenance in a wireless network
US7778149B1 (en) 2006-07-27 2010-08-17 Tadaaki Chigusa Method and system to providing fast access channel
US7873327B2 (en) * 2006-08-22 2011-01-18 Alcatel-Lucent Usa Inc. Method for adaptively controlling other cell interference
US9049651B2 (en) 2006-08-25 2015-06-02 Qualcomm Incorporated Selection of an access point in a communications system
US7647025B2 (en) * 2006-09-29 2010-01-12 Alcatel-Lucent Usa Inc. Method for adaptively controlling and coordinating other cell interference
US8838104B2 (en) * 2006-10-18 2014-09-16 Mediatek Inc. Method for handover in a mobile wireless system
JP4886463B2 (en) 2006-10-20 2012-02-29 キヤノン株式会社 Communication parameter setting method, communication apparatus, and management apparatus for managing communication parameters
US7907582B2 (en) * 2006-10-25 2011-03-15 Ntt Docomo, Inc. Method and apparatus for access point selection in wireless LAN
KR100706180B1 (en) * 2006-11-09 2007-04-13 주식회사 유컴테크놀러지 Method of accessing channel for rfid reader and computer-readable medium having thereon program performing function embodying the same
US8160096B1 (en) 2006-12-06 2012-04-17 Tadaaki Chigusa Method and system for reserving bandwidth in time-division multiplexed networks
US8248948B2 (en) * 2007-04-03 2012-08-21 Tropos Networks, Inc. Monitoring network conditions of a wireless network
US8681691B2 (en) 2007-07-25 2014-03-25 Microsoft Corporation Base station initiated proximity service discovery and connection establishment
US7974574B2 (en) 2007-07-25 2011-07-05 Microsoft Corporation Base station initiated proximity service discovery and connection establishment
CN101373998B (en) * 2007-08-20 2012-07-25 上海贝尔阿尔卡特股份有限公司 Low information interactive multi-base station collaboration MIMO as well as scheduling method and apparatus thereof
US8285281B2 (en) * 2007-10-29 2012-10-09 Qualcomm Incorporated Methods and apparatus for self configuring network relations
WO2009062188A1 (en) * 2007-11-09 2009-05-14 G2 Microsystems Pty. Ltd Receiver napping between signals
US9648493B2 (en) 2007-11-16 2017-05-09 Qualcomm Incorporated Using identifiers to establish communication
US20090132674A1 (en) * 2007-11-16 2009-05-21 Qualcomm Incorporated Resolving node identifier confusion
US9105031B2 (en) 2008-02-22 2015-08-11 Microsoft Technology Licensing, Llc Authentication mechanisms for wireless networks
KR20090112323A (en) * 2008-04-24 2009-10-28 엘지전자 주식회사 Method for handover considering load status of cells
US9094979B2 (en) * 2008-05-16 2015-07-28 Qualcomm Incorporated Load balancing in a wireless communication system
US9585069B2 (en) 2008-06-19 2017-02-28 Qualcomm Incorporated Access terminal assisted node identifier confusion resolution
EP2144428B1 (en) 2008-07-09 2011-12-28 Telefonaktiebolaget LM Ericsson (publ) Modem apparatus for a modular wireless communication system
US8743858B2 (en) 2008-07-15 2014-06-03 Qualcomm Incorporated Wireless communication systems with femto cells
US8989138B2 (en) * 2008-07-15 2015-03-24 Qualcomm Incorporated Wireless communication systems with femto nodes
JP5106300B2 (en) * 2008-07-31 2012-12-26 キヤノン株式会社 Management device, communication device, control method, and program
US8571560B1 (en) 2008-09-23 2013-10-29 Sprint Communications Company L.P. Selecting a wireless access point based on status information
US7961679B2 (en) 2008-10-14 2011-06-14 Qualcomm Incorporated Methods and systems for broadcasting QoS information to assist admission control in wireless communication systems
US8391224B2 (en) * 2009-03-03 2013-03-05 Avaya Inc. Proactive load distribution for 802.111-based wireless LANs
US8385197B2 (en) * 2009-03-03 2013-02-26 Avaya Inc. Practical measurement-based session admission control for Wi-Fi LAN systems
ES2432072T3 (en) * 2009-06-18 2013-11-29 Anyfi Networks Ab An access point, a server and a system to distribute an unlimited number of virtual IEEE 802.11 wireless networks through a heterogeneous infrastructure
GB2474503B (en) 2009-10-19 2014-05-21 Ubiquisys Ltd Controlling mobility in cellular networks
US8611915B2 (en) * 2009-12-30 2013-12-17 Motorola Solutions, Inc. Method for providing control of push-to-talk communication
US20120003987A1 (en) * 2010-06-30 2012-01-05 Subramanian Vasudevan Method And Apparatus For Optimizing Network Throughput
TWI407806B (en) 2010-07-20 2013-09-01 Gemtek Technology Co Ltd Wireless network system and wireless access point device and wireless terminal device thereof
CN102340793B (en) * 2010-07-23 2015-09-16 中兴通讯股份有限公司 The choosing method of temporary core network, base station and trunked communication system
US9148851B2 (en) 2010-08-20 2015-09-29 Lg Electronics Inc. Method and terminal for searching for an access point
JP5353940B2 (en) * 2011-04-04 2013-11-27 ブラザー工業株式会社 Communication system, remote control, communication method and program
KR101723214B1 (en) 2011-11-30 2017-04-06 주식회사 케이티 Access Point having multi channel and multi transmission power, cell formation method
US9253718B2 (en) * 2012-11-04 2016-02-02 Kt Corporation Establishing wireless connection based on network status
KR20130099532A (en) * 2012-02-29 2013-09-06 주식회사 팬택 Terminal and method for determining priority of connection wiht wifi access point
US20130242966A1 (en) * 2012-03-19 2013-09-19 Qualcomm Incorporated Initiating access terminal communication based on access point loading
US9474017B2 (en) * 2012-05-31 2016-10-18 Motorola Solutions, Inc. Method and apparatus for controlling network selection
KR102103457B1 (en) * 2013-11-18 2020-04-22 주식회사 케이티 Method for searching access point managing linkage in wireless LAN system
US9635606B2 (en) 2012-11-04 2017-04-25 Kt Corporation Access point selection and management
US9241281B2 (en) * 2013-06-12 2016-01-19 Honeywell International Inc. Apparatus and method for reporting of communication path quality within a wireless network
US9154996B2 (en) 2013-06-12 2015-10-06 Honeywell International Inc. Apparatus and method for maintaining reliability of wireless network having asymmetric or other low quality wireless links
CN104244274B (en) * 2013-06-18 2018-09-28 华为技术有限公司 A kind of Wireless Fidelity Wi-Fi monitoring methods and device
US10003536B2 (en) 2013-07-25 2018-06-19 Grigore Raileanu System and method for managing bandwidth usage rates in a packet-switched network
US9572020B2 (en) 2013-09-19 2017-02-14 Honeywell International Inc. Apparatus and method supporting wireless communications between devices using different application protocols in industrial control and automation systems
US20150103738A1 (en) * 2013-10-16 2015-04-16 Qualcomm Incorporated Selecting an access point for determining position of a device based on traffic load information
WO2015126302A1 (en) * 2014-02-21 2015-08-27 Telefonaktiebolaget L M Ericsson (Publ) Selection of capillary network gateway to a cellular network
US10924408B2 (en) 2014-11-07 2021-02-16 Noction, Inc. System and method for optimizing traffic in packet-switched networks with internet exchanges
US9769070B2 (en) 2015-01-28 2017-09-19 Maxim Basunov System and method of providing a platform for optimizing traffic through a computer network with distributed routing domains interconnected through data center interconnect links
US11228925B2 (en) 2015-07-01 2022-01-18 Comcast Cable Communications, Llc Providing utilization information for intelligent selection of operating parameters of a wireless access point
US20170006479A1 (en) * 2015-07-01 2017-01-05 Comcast Cable Communications, Llc Intelligent Selection of Operating Parameters for a Wireless Access Point
KR101702532B1 (en) 2015-10-23 2017-02-03 영남대학교 산학협력단 Wireless access point device and wireless communication method thereof
US11696216B2 (en) 2016-02-18 2023-07-04 Comcast Cable Communications, Llc SSID broadcast management to support priority of broadcast
CN105828386A (en) * 2016-04-12 2016-08-03 重庆金美通信有限责任公司 Multi-AP joint control method for user balanced access in WiFi network
KR101867523B1 (en) * 2016-11-15 2018-06-14 주식회사 케이티 Method and system for connectting access point using network status information
US20220191922A1 (en) * 2019-04-01 2022-06-16 Beijing Xiaomi Mobile Software Co., Ltd. Method and apparatus for random access on unlicensed spectrum, and storage medium
US11382028B2 (en) 2020-10-23 2022-07-05 Bluwireless Technology Limited Wireless communication for vehicle based node

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6002918A (en) * 1989-06-29 1999-12-14 Symbol Technologies, Inc. Power-saving arrangement and method for mobile units in communications network
NL9301544A (en) * 1993-09-07 1995-04-03 Nederland Ptt Method for selecting connections in networks, and networks in which the method is applied.
US5361258A (en) * 1993-10-22 1994-11-01 Bell Communications Research, Inc. Beacon detection system for sharing spectrum between wireless communications systems and fixed microwave systems
CA2129193C (en) * 1994-07-29 1999-07-20 Peter E. Reissner Access point tracking for mobile wireless network node
US5583866A (en) * 1994-12-05 1996-12-10 Motorola, Inc. Method for delivering broadcast packets in a frequency hopping local area network
US5835061A (en) * 1995-06-06 1998-11-10 Wayport, Inc. Method and apparatus for geographic-based communications service
US5987062A (en) * 1995-12-15 1999-11-16 Netwave Technologies, Inc. Seamless roaming for wireless local area networks
JP3019061B2 (en) 1997-06-27 2000-03-13 日本電気株式会社 Mobile communication system and radio channel control method therefor
US6111867A (en) 1997-12-12 2000-08-29 Nortel Networks Limited Method and apparatus for load shedding in a TDMA packet data system
DE19804185A1 (en) 1998-02-03 1999-08-05 Siemens Ag Method and device for exchanging signaling information between base stations in a mobile radio system
US6259898B1 (en) * 1998-05-05 2001-07-10 Telxon Corporation Multi-communication access point

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