WO2014193394A1 - Points d'accès sans fil fournissant des communications hybrides en mode 802.11 et en mode à accès prioritaire programmé - Google Patents

Points d'accès sans fil fournissant des communications hybrides en mode 802.11 et en mode à accès prioritaire programmé Download PDF

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Publication number
WO2014193394A1
WO2014193394A1 PCT/US2013/043436 US2013043436W WO2014193394A1 WO 2014193394 A1 WO2014193394 A1 WO 2014193394A1 US 2013043436 W US2013043436 W US 2013043436W WO 2014193394 A1 WO2014193394 A1 WO 2014193394A1
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WO
WIPO (PCT)
Prior art keywords
priority
client
access
standard
access point
Prior art date
Application number
PCT/US2013/043436
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English (en)
Inventor
Jaime Fink
David Gurevich
Brian Hinman
Ashok N. MASILAMANI
Vishakan Ponnampalam
Original Assignee
Mimosa Networks, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mimosa Networks, Inc. filed Critical Mimosa Networks, Inc.
Priority to PCT/US2013/043436 priority Critical patent/WO2014193394A1/fr
Publication of WO2014193394A1 publication Critical patent/WO2014193394A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates generally to wireless communications, and more specifically, but not by way of limitation, to wireless access points that are configured to service a hybrid collection of standard 802.11 clients and priority access clients.
  • a wireless access point is a device that allows wireless devices such as computers, telephones, appliances, and other similar network enabled computing devices to connect to a wired network using Wi-Fi, or related standards.
  • the AP allows the network enabled devices to access, for example, the Internet, or allows the network enabled devices to communicate with one another over the network.
  • APs typically utilize one or more protocols specified in the IEEE 802.11 standards. That is, an AP may be configured to service clients that utilize one or more protocols that are IEEE 802.11 standards compliant.
  • the present disclosure is directed to a wireless access point that comprises: (a) a processor; and (b) a memory for storing instructions, wherein the instructions when executed by the processor cause the wireless access point to perform operations comprising: (i) communicating with a set of standard access clients using an 802.11 mode of communication during standard access phases; and (ii) communicating with a set of priority access clients during priority access phases, when the wireless access point is not communicating with the set of standard access clients, using a priority mode of communication.
  • the present disclosure is directed to a method of communicating with standard 802.11 clients and priority access clients that utilize a priority access MAC protocol, using a wireless access point.
  • the method may comprise: (i) silencing both standard access clients and priority access clients prior to standard access phases; (ii) communicating with standard access clients using an 802.11 mode of communication during standard access phases; (iii) silencing both standard access clients and priority access clients prior to priority access phases; and (iv) communicating with groups of priority access clients during priority access phases using the priority access MAC protocol.
  • the present disclosure is directed to a computing device configured to communicate with a wireless access point using a media access control (MAC) protocol.
  • the computing device comprises: (a) a processor; and (b) a memory for storing a MAC protocol, wherein the MAC protocol is executed by the processor to: (i) evaluate a priority activation frame received from the wireless access point to determine if a group identifier included in the priority activation frame corresponds to a group identifier assigned to the computing device by the wireless access point; (ii) communicate with the wireless access point, for a specified period of time specified in the priority activation frame, if the group identifier of the priority activation frame matches the group identifier of the computing device; and (iii) cease communication with the wireless access point if the group identifier of the priority activation frame does not match the group identifier of the computing device.
  • MAC media access control
  • the present disclosure is directed to a node within a wireless communications network that schedules access for both standard 802.11 clients and priority access clients to the Internet, the node comprising: (a) a standard 802.11 client interface for communicating with client devices using a standard 802.11 mode; (b) a priority media access control/physical (MAC/PHY) interface for communicating with client devices using a priority access MAC protocol; and (c) a scheduling module that manages standard access phases and priority access phases, wherein the standard access phases comprise time periods where the node silences client devices using the priority access MAC protocol and allows client devices using a standard 802.11 mode to communicate with the node, and wherein the priority access phases comprise time periods where the node silences client devices using standard 802.11 mode and allows client devices using the priority access MAC protocol to communicate with the node.
  • the standard access phases comprise time periods where the node silences client devices using the priority access MAC protocol and allows client devices using a standard 802.11 mode to communicate with the node
  • the priority access phases comprise time periods where
  • FIG. 1 is an exemplary WiFi network that may be utilized to practice aspects of the present technology
  • FIG. 2 is an exemplary communication schedule for a wireless access point that communicates with both standard 802.11 clients and priority access clients;
  • FIG. 3 is an exemplary signal flow diagram illustrating the operation of a wireless access point during a standard access phase
  • FIG. 4 is an exemplary signal flow diagram illustrating the operation of a wireless access point when switching between standard and priority access phases of operation
  • FIG. 5 is a signal flow diagram that illustrates the wireless access point switching between standard and priority access phases, namely when a standard access client is currently transmitting data to the wireless access point after expiration of the duration associated with the standard access phase;
  • FIG. 6 is a signal flow diagram that illustrates the wireless access point switching between standard and priority access phases, namely when the wireless access point is currently transmitting data to the standard access client after expiration of the duration associated with the standard access phase;
  • FIG. 7 is an exemplary signal flow diagram illustrating the operation of a wireless access point during a priority access phase, where the wireless access point schedules communications for two client groups of priority access clients;
  • FIG. 8 is an exemplary signal flow diagram illustrating the operation of a wireless access point during a priority access phase, where the wireless access point utilizes both priority activation and deactivation frames to schedule communications for two client groups of priority access clients;
  • FIG. 9 is a flowchart of an exemplary method for scheduling communication of standard 802.11 clients and priority access clients that utilize a priority access MAC protocol, using a wireless access point;
  • FIG. 10 illustrates an exemplary computing device that may be used to implement an embodiment of the present technology
  • the present technology provides a wireless access point (AP) that utilizes both traditional 802.11 AP modes that support standard 802.11 Wi-Fi clients, as well as a priority access MAC-PHY interface for servicing enhanced scheduled priority access clients.
  • the present technology increases the client capacity on the AP by managing individual fixed broadband client airtime fairness, reducing latency, and
  • an AP can concurrently leverage those additional intervals for scheduled medium access to better manage the diverse latency sensitive higher throughput demanding fixed client population.
  • a single AP can provide high capacity and improved efficiency fixed and Wi-Fi support, and adapt bandwidths as necessary to respond to the changing needs in fixed and nomadic device types and their varying usage application demands.
  • HCF was introduced in the IEEE 802. He standard and provides a statistical method for providing quality of service to clients. It will be understood by to those skilled in the art that while HCF provides a level of quality of service in the statistical sense, HCF methods cannot provide the level of quality of service required for carrier/operator-grade networks.
  • the present technology relates to and incorporates aspects of the IEEE 802.11 standards. Namely, the following definitions from various sections of the IEEE 802.11 standards are provided herein for reference purposes. NAV - Network Allocation Vector (also referred to as "Virtual Carrier Sensing"); PCF - Point Coordination
  • FIG. 1 is a block diagram of an exemplary WiFi network 100, constructed in accordance with various embodiments of the present technology.
  • the network 100 may include a plurality of end user client devices that include both a standard 802.11 client, hereinafter "standard access client 105" as well as a priority client, hereinafter "priority access client 110."
  • standard access client 105" a standard 802.11 client
  • priority access client 110 a priority client
  • the standard access client 105 includes any computing device that is configured to operate on any IEEE 802.11 specified protocol, such as 802.11a through 802.11 ⁇ .
  • the priority access client 110 may comprise a processor 115 and a memory 120.
  • the priority access client 110 may include a priority media access control (MAC) protocol 125 that allows the priority access client 110 to communicate with an AP 130.
  • MAC priority media access control
  • AP 130 may communicate with a plurality of standard access clients and a plurality of priority access clients simultaneously, as will be described in greater detail below.
  • the priority access client 110 may be configured to utilize both standard and priority protocols to communicate with the AP 130.
  • both the standard access client 105 and the priority access client 110 communicatively couple with the AP 130 in a wireless manner, as will be described in greater detail below. It will be understood that the AP 130 may be coupled with a wired/wireless network 170, such as the Internet.
  • the AP 130 generally includes a processor 135, a memory 140 having a standard 802.11 client layer 145 and a priority access MAC layer 150, a cache 155, and a scheduling module 160.
  • the processor 135 of the AP 130 executes instructions within the memory 140 of the AP 130 to allow a hybrid mix of communications between both the standard access client 105 and the priority access client 110.
  • both the standard layer 145 and the priority access layer 150 may be arranged as sublayers of a data link layer of a TCP/IP layer used by the AP 130.
  • the AP 130 may include, for example, a wireless router or other wireless hub or device that is configured to function as an interface between client devices and a network medium, such as the wired/wireless network 170.
  • the AP 130 may include a node within any network that is configured to service both standard access clients and priority access clients, where the priority access clients utilize a priority access MAC layer to communicate with the node. As with the AP 130, this node is configured to schedule access to the network for both the standard access clients and the priority access clients, allowing the node to service a much greater spectrum of client devices.
  • the AP 130 services standard non-priority 802.11 clients and/or priority access clients operating in standard 802.11 mode. These clients are able to associate with the AP 130 and send / receive data during this phase.
  • the second phase of operation for the AP 130 is a priority access phase.
  • the AP 130 services priority access clients that run a priority access MAC protocol.
  • the AP 130 allows for the scheduling of both the standard and priority access clients using the scheduling module 160.
  • FIG. 2 illustrates the operation of the AP 130 in both standard and priority access phases.
  • the scheduling module 160 of the AP 130 alternates standard access phases with the priority access phases. Because the AP 130 executes this alternation transparently to the client devices, the AP 130 is able to simultaneously offer access to the network 170 to both the standard and priority access clients.
  • the scheduling module 160 manages standard access phases and priority access phases for the AP 130.
  • a standard access phase comprise a time period where the AP 130 allows only client devices using a standard 802.11 mode to communicate with the AP 130.
  • the priority access phases comprise time periods where the scheduling module 160 of the AP 130 allows only client devices using the priority access MAC protocol to communicate with the AP 130.
  • Priority may be referred to as proprietary or fixed-access.
  • the AP 130 prior to each phase (standard or priority), the AP 130 is configured to transmit a silencing signal to all clients, regardless of the mode of communication utilized by the client device.
  • the phases are implemented by the scheduling module 160 in time divided intervals.
  • Ts is the duration that the AP 130 is allowed to operate in a standard access phase and T P is the duration of operation in a priority access phase.
  • the scheduling module 160 of the AP 130 alternates these phases such that they repeat over time as shown in FIG. 2.
  • FIG. 3 illustrates the operation of the AP 130 during a standard access phase.
  • the AP 130 starts operating in the standard access phase by authenticating and associating both standard 802.11 clients and priority access clients operating in a standard 802.11 mode.
  • Standard 802.11 clients are referred to as STASTDI/ STASTTO priority. It will be understood that in some instances the reference “STASTD” may be utilized to refer generally to clients that operate in standard 802.11 mode.
  • an association context may include encryption keys for the supported clients, which are stored into the cache 155.
  • the AP 130 allows for automatic sharing of the wired or wireless network 170 associated with the AP 130 through the use of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and a random back-off time following a busy medium condition as per the DCF operation described in the IEEE 802.11 standard.
  • the AP 130 may perform career Sensing (CS) through both virtual and physical mechanisms.
  • FIG. 4 illustrates the AP 130 switching from a standard access phase to a priority access phase.
  • the AP 130 When the AP 130 has operated in the standard access phase for a time duration T > Ts, the AP 130 switches to a priority mode of operation. In some instances, the AP 130 initiates the switch by sending a CTS-to-Self frame 405 with its duration field set to TP in order to silence all client devices.
  • STASTDI and STASTD2 standard access clients
  • the transmission of CTS-to-self frames to all clients functions to silence all clients prior to the AP 130 communicating with priority access clients during the duration of the TP (e.g., a priority access phase).
  • the transmission of the CTS-to-self frames functions to silence both standard access clients and all priority access clients that are not in a client group with which the AP 130 is currently
  • the AP 130 may selectively communicate with each group of priority access clients using an association context, such as a group ID and encryption key. As will be described in greater detail below, the AP 130 may selectively communicate with priority access clients using priority activation and deactivation frames, within a given priority access phase.
  • the AP 130 may send as many CTS-to-Self frames as required for all the standard operating clients to remain in NAV for duration of TP.
  • the AP 130 may send the CTS-to-Self frames at a data rate such that all standard operating clients, including 802.11 ⁇ clients that operate in the same band, do not interfere with the AP 130 operation during the priority access phase.
  • FIG. 4 also illustrates the switching of the AP 130 between standard and priority access phases, and specifically, during instances where the AP 130 is operating in NAV mode. It will be understood that the AP 130 may be put into NAV by virtue of a CTS frame that is received by the AP 130 from a standard access client 420. If the AP 130 is currently operating in NAV mode, the AP 130 waits until the NAV period 410 has expired and sends a CTS-to-self frame 405 after one PIFS interval 415. As per the IEEE 802.11 standard, PIFS ⁇ DIFS and hence the AP 130 gains access to the medium, such as the wired network 170 (see FIG. 1) before any standard operating client gains a transmit opportunity.
  • the medium such as the wired network 170 (see FIG. 1) before any standard operating client gains a transmit opportunity.
  • FIG. 5 is a signal flow diagram that illustrates the AP 130 switching between standard and priority access phases, namely when a standard access client is currently transmitting data to the AP 130 after expiration of the duration Ts associated with a standard access phase. If the AP is currently receiving a packet from a standard access client such as STASTDI, the AP 130 waits until the packet is received and sends an Ack frame(if necessary) to the standard access client STASTDI. The AP 130 also sends the CTS- to-Self frame 505.
  • a standard access client such as STASTDI
  • FIG. 6 is a signal flow diagram that illustrates the AP 130 switching between standard and priority access phases, namely when the AP 130 is currently transmitting data to a standard access client after expiration of the duration Ts associated with the standard access phase.
  • the AP is currently sending a packet to a STASTDI
  • the AP 130 completes the current ongoing transmission, waits for an Ack frame (if necessary) from the standard access client STASTDI, and sends a CTS-to-Self frame 605 after PIFS interval 610. So at the AP 130, when the Ts threshold is reached, the ongoing transmissions are allowed to complete before the AP 130 sends any CTS-to-Self frame, thus switching the AP 130 into the priority access phase.
  • the AP 130 switches a TX/RX profile at the AP 130 in order to service priority access clients that belong to Client Group 1 (CGI).
  • CGI Client Group 1
  • FIGS. 7 and 8 collectively illustrate the operation of the AP 130 during priority access phases.
  • the AP 130 groups the priority access clients into Client Groups (CGs) based on different CGs.
  • CGs Client Groups
  • the AP 130 may assign a unique client group identifier to each client group created.
  • the unique client group identifiers assigned to the client groups may be utilized by the AP 130 to coordinate or schedule access for the priority access client groups as will be described in greater detail below.
  • the AP 130 sends a priority Action Frame called here as Priority Activation Frame (PAF) with CG_ID 1 and Duration dcgl( ⁇ dp) specified.
  • PAF Priority Activation Frame
  • the PAF includes a client group identifier and a duration that specifies how long the client group is allowed to contend for access to the network 170.
  • the AP 130 then loads the cache 155 with an association context, such as any encryption key for the STAPA (priority access clients) that belong the CG_ID 1 group. Clients that belong to CG_ID 1 begin to contend for a channel opened by the AP 130, upon the clients receiving a PAF from the AP 130 after a duration of dc.
  • the dc duration is a time the AP 130 requires to reload the cache 155 with new keys. This allows clients that belong to CG_ID 1 to access the channel for a duration of dcgl.
  • the AP 130 waits until current transaction is complete and sends a PAF with CG_ID 2 and duration dcg2 and reloads the cache 155.
  • STAPA that belong to CG_ID 2 start to contend for the channel after expiration of the duration dc.
  • STAPA belonging to a particular group can access the medium only after receiving a PAF from AP 130 for that group and only for the duration specified in the PAF frame.
  • the "dc" duration may comprise a duration of any desired length.
  • the length of the duration may be predicated upon the time required by the AP 130 to reload the cache 155 with encryption keys for a client group. That is, the "dc" duration can include an arbitrary amount of time that defines how long it takes the AP 135 to unload and reload encryption keys in the cache 155.
  • the "dc" duration may be equal to the amount of time it takes to purge the cache 155 of encryption keys for client group CG_ID 1, as well as the time it takes the AP 130 to load encryption keys for client group CG_ID 2.
  • the AP 130 can also activate and deactivate the groups of priority access clients by sending Priority Activation Frame (PAF) and Priority Deactivation Frame (PDF).
  • PAF Priority Activation Frame
  • PDF Priority Deactivation Frame
  • the switch in profile occurs before the transmission of the frames.
  • the AP 130 divides the nodes into groups and assigns dCG values to the different groups taking the dp into account such that during a single phase,
  • Tmax is the maximum time for an ongoing transmission opportunity (TXOP) transaction. Therefore, when a STASTD begins to contend for the channel after its NAV, the AP 130 has already loaded an association context of the STASTD in its cache 155 and has switched to the standard access phase of operation. The STASTD are now serviced and the operation repeats over time.
  • the AP 130 includes an 802.11ac 4x4:4 DL-MU-MIMO processor, configured with four panel antennas fixed 90-degree radiation patterns with limited overlap to achieve a near 360-degree total coverage. Additional details regarding antennas having four panel antennas fixed 90-degree radiation patterns are described in co-pending U.S. Patent Application Serial No. X, filed on X, entitled "Simultaneous Downlink Transmission to Multiple Single-User MIMO Clients/' which is incorporated by reference herein.
  • FIG. 9 is a flowchart of an exemplary method for scheduling communication of standard 802.11 clients and priority access clients that utilize a priority access MAC protocol, using a wireless access point.
  • the method may include transmitting 905 a silencing signal to all clients prior to standard access phases.
  • the AP may send a CTS-to-self frame to all clients prior to initiating communications with standard access clients.
  • the method may also include communicating 910 with standard access clients during standard access phases.
  • the method may include transmitting 915 a silencing signal to all clients prior to priority access phases.
  • the method may then include selectively
  • the AP may
  • the AP may communicate with each group of priority clients within a given priority access phase, while standard access clients are in, for example, an NAV mode.
  • FIG. 10 illustrates an exemplary computing device 1000 that may be used to implement an embodiment of the present technology.
  • the device 1000 of FIG. 10 may be implemented in the contexts of the likes of computing devices, such as the client devices that utilized a priority access MAC/PHY layer to communicate with an AP.
  • the computing device 1000 of FIG. 10 includes a processor 1010 and memory 1020.
  • Memory 1020 stores, in part, instructions and data for execution by processor 1010.
  • Memory 1020 may store the executable code when in operation.
  • the system 1000 of FIG. 10 further includes a mass storage device 1030, portable storage medium drive(s) 1040, output devices 1050, input devices 1060, a graphics display 1070, and peripheral device(s) 1080.
  • FIG. 10 The components shown in FIG. 10 are depicted as being connected via a single bus 1090. The components may be connected through one or more data transport means. Processor 1010 and main memory 1020 may be connected via a local
  • microprocessor bus and the mass storage device 1030, peripheral device(s) 1080, portable storage medium drive(s) 1040, and graphics display 1070 may be connected via one or more input/output (I/O) buses.
  • I/O input/output
  • Mass storage device 1030 which may be implemented with a magnetic disk drive or an optical disk drive, is a non-volatile storage device for storing data and instructions for use by processor 1010. Mass storage device 1030 may store the system software for implementing embodiments of the present invention for purposes of loading that software into main memory 1020.
  • Portable storage medium drive(s) 1040 operates in conjunction with a portable non-volatile storage medium, such as a floppy disk, compact disk, digital video disc, or USB storage device, to input and output data and code to and from the computing system 1000 of FIG. 10.
  • a portable non-volatile storage medium such as a floppy disk, compact disk, digital video disc, or USB storage device
  • the system software for implementing embodiments of the present invention may be stored on such a portable medium and input to the computing device 1000 via the portable storage medium drive(s) 1040.
  • Input devices 1060 provide a portion of a user interface.
  • Input devices 1060 may include an alphanumeric keypad, such as a keyboard, for inputting alpha-numeric and other information, or a pointing device, such as a mouse, a trackball, stylus, or cursor direction keys.
  • the device 1000 as shown in FIG. 10 includes output devices 1050. Suitable output devices include speakers, printers, network interfaces, and monitors.
  • Graphics display 1070 may include a liquid crystal display (LCD) or other suitable display device. Graphics display 1070 receives textual and graphical
  • Peripheral device(s) 1080 may include any type of computer support device to add additional functionality to the computing system.
  • Peripheral device(s) 1080 may include a modem or a router.
  • the components provided in the computing device 1000 of FIG. 10 are those typically found in computing systems that may be suitable for use with embodiments of the present invention and are intended to represent a broad category of such computer components that are well known in the art.
  • the computing system 1000 of FIG. 10 may be a personal computer, hand held computing system, telephone, mobile computing system, workstation, server, minicomputer, mainframe computer, or any other computing system.
  • the computer may also include different bus configurations, networked platforms, multi-processor platforms, etc.
  • Various operating systems may be used including Unix, Linux, Windows, Macintosh OS, Palm OS, Android, iPhone OS and other suitable operating systems.
  • Some of the above-described functions may be composed of instructions that are stored on storage media (e.g., computer-readable medium).
  • the instructions may be retrieved and executed by the processor.
  • Some examples of storage media are memory devices, tapes, disks, and the like.
  • the instructions are operational when executed by the processor to direct the processor to operate in accord with the technology. Those skilled in the art are familiar with instructions, processor(s), and storage media.
  • Non-volatile media include, for example, optical or magnetic disks, such as a fixed disk.
  • Volatile media include dynamic memory, such as system RAM.
  • Transmission media include coaxial cables, copper wire and fiber optics, among others, including the wires that comprise one embodiment of a bus.
  • Transmission media can also take the form of acoustic or light waves, such as those generated during radio frequency (RF) and infrared (IR) data communications.
  • RF radio frequency
  • IR infrared
  • Common forms of computer-readable media include, for example, a floppy disk, a flexible disk, a hard disk, magnetic tape, any other magnetic medium, a CD-ROM disk, digital video disk (DVD), any other optical medium, any other physical medium with patterns of marks or holes, a RAM, a PROM, an EPROM, an EEPROM, a FLASHEPROM, any other memory chip or data exchange adapter, a carrier wave, or any other medium from which a computer can read.
  • Various forms of computer-readable media may be involved in carrying one or more sequences of one or more instructions to a CPU for execution.
  • a bus carries the data to system RAM, from which a CPU retrieves and executes the instructions.
  • the instructions received by system RAM can optionally be stored on a fixed disk either before or after execution by a CPU.
  • Computer program code for carrying out operations for aspects of the present technology may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C"
  • the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.
  • These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
  • the computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s).
  • the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

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Abstract

La présente invention se rapporte à des points d'accès sans fil fournissant des communications hybrides en mode 802.11 et en mode à accès prioritaire programmé. Un point d'accès sans fil fourni à titre d'exemple peut être configuré de façon à communiquer avec un ensemble de clients à accès standard au moyen d'un mode de communication 802.11 durant des phases d'accès standard, et à communiquer également avec un ensemble de clients à accès prioritaire durant des phases d'accès prioritaire, quand le point d'accès sans fil n'est pas en train de communiquer avec l'ensemble de clients à accès prioritaire, au moyen d'un mode de communication prioritaire.
PCT/US2013/043436 2013-05-30 2013-05-30 Points d'accès sans fil fournissant des communications hybrides en mode 802.11 et en mode à accès prioritaire programmé WO2014193394A1 (fr)

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