KR102369951B1 - Adaptive Antenna for Channel Selection Management in Communication Systems - Google Patents

Abstract

The present invention relates to a communication system in which an adaptive antenna system with an algorithm is used to provide improved channel selection management in wireless local area networks (WLANs) and other multi-node communication systems. Adaptive antenna systems may be integrated into multiple nodes of a communication network, such as access points used in WLANs, and are optimal for client communication links to an access point to aid channel selection across the nodes in the network. It can be integrated into multiple radiation modes that are generated and tracked to determine the mode. Adaptive antenna system modes are selected and signal-to-noise ratio (SNR) measurements on the available frequency channels to determine the channel to allocate per access point along with the radiation modes to implement which improves the SNR of the communication links established in the network. .

Description

Adaptive Antenna for Channel Selection Management in Communication Systems

claim priority

This application claims the benefit of priority from U.S. Patent Application Serial No. 15/703,794, entitled "Adaptive Antenna for Channel Selection Management in Communication Systems," filed September 13, 2017, which is incorporated herein by reference for all purposes. The specification is incorporated by reference.

field of invention

FIELD OF THE INVENTION The present invention relates generally to the field of wireless communications. More particularly, it relates to an adaptive antenna system for improved channel selection management in wireless local area networks (WLANs) and other multi-node communication systems.

WLANs have been adopted by homes and businesses in most regions of the world, and there are many client devices such as smartphones, laptops and tablets capable of WLAN reception. Recently, WLANs have been adopted for high-throughput applications such as video streaming of applications in buildings. These devices require good performance in RF radio and antenna systems to ensure quality operation, and these devices increase the number of WLAN antenna systems and RF signals originating in businesses, apartment buildings and neighbourhoods. The requirement for increased data rates to support a greater number of users and video applications requires a higher modulation order in the transmitted signal, which has improved levels of signal to support higher modulation rates. Collectively we call for "metrics" to be noise-to-noise ratio (SNR) or signal-to-interference and noise ratio (SINR). In particular, better control of the radiation field from the antenna system associated with the access point will be required to provide better communication link quality to antenna systems that are tasked with providing more throughput and more reliable links.

Due to the limited range of electromagnetic (EM) signals propagating into buildings in WLAN frequency bands, it is becoming increasingly common to configure multiple access points in a network to provide continuous wireless service. Roaming inside a WLAN involves a situation in which a wireless device moves a connection from one access point to another within a Wi-Fi network because the signal strength from the original access point becomes too weak. The wireless device may include an algorithm that periodically monitors the presence of alternative access points, which may provide a better connection and may be associated with an access point with a stronger signal. However, it is difficult to predict the Wi-Fi signal strength for a specific area with respect to the transmitter due to the complex nature of radio waves. In many cases, the line of sight between the transmitter and receiver involved in communication is blocked or shaded by obstacles such as walls, trees and other objects. Each signal bounce can cause phase shifts, time delays, attenuations and distortions, each of which ultimately interferes at the receive antenna. Destructive interference of radio links is problematic and degrades device performance. A signal quality metric is often used to evaluate the quality of signals. Examples of the quality metrics introduced above include Signal-to-Noise Ratio (SNR), Signal to Interference and Noise Ratio (SINR), Receive Signal Strength Indicator (RSSI), Bit Error Rate (BER), and channel quality indicator (CQI). ) may contain various other metrics.

Increasing the number of access points in a Wi-Fi network generally provides network redundancy and defines smaller cells to support fast roaming. However, if there are too many devices connected to one access point in the same area, Wi-Fi connections may be interrupted or the Internet speed may be slow due to interference. When multiple access points are used in a system to provide WLAN coverage for a building, a standard technique is to assign different channels (frequency) to adjacent access points to reduce interference between the access points. With a finite frequency bandwidth available in the 2.4 GHz and 5 GHz WLAN bands and a set number of channels available, the frequency separation that can be achieved between adjacent access points is typically a channel of frequency components radiated by one access point. The foreign roll-off is not large enough to eliminate interfering with neighboring access points. Such interference typically manifests as a decrease in SINR at the receiving port of a neighboring access point, which reduces the modulation scheme that can be supported and reduces data throughput. In wireless devices typically configured with one or more antennas, these antennas are passive antennas with a fixed radiation pattern (ie, one radiation pattern), and use the antenna system as a tool to improve the SINR of an access point in the presence of interfering signals. cannot be used as This situation leads to suboptimal traffic where quality of service (QOS) is provided to suboptimal users.

jointly owned patents US 7,911,402; US 8,362,962; US 8,648,755; and US 9,240,634, each of which is incorporated herein by reference in its entirety, each describing a beam steering technique in which a single antenna can produce multiple radiation modes, wherein a single antenna provides distinct radiation in each of a plurality of possible modes. represents a pattern. This is achieved using an offset parasitic element that changes the current distribution of the driving antenna as the parasitic reactive load changes. This beam steering technique in which multiple modes are created will be referred to as "modal antenna technique" and an antenna configured to change the radiation mode in this way will be referred to herein as a "modal antenna". This antenna architecture addresses the problem associated with the lack of volume of mobile devices and small commercial communication devices to accommodate the antenna array needed to implement more traditional beam steering hardware.

This modal antenna technology can be implemented in access points and client devices of WLAN systems and is used to improve the communication link performance of such networks. When multi-user operation is required, the ability to optimize the radiation pattern of the antennas at the access point on the access point side of the link is important to optimize link performance. Compared to passive antennas used with access points, modal antennas provide improved antenna gain performance in the direction of client devices by sampling multiple radiation modes of the modal antenna and selecting the mode that provides improved system gain per client. can do. The increased antenna system gain from the modal antenna will translate into an increase in signal-to-noise ratio (SNR), which will translate to a higher order modulation scheme that can be supported for higher data throughput.

1 shows four radiation pattern modes of a single modal antenna.
2 includes a network controller, two access points comprising a first access point labeled “API” and a second access point labeled “AP2”, and four client devices wirelessly connected to the two access points; A communication system is shown.
3 shows channel utilization for three access points labeled “API”, “AP2” and “AP3”.
4 shows channel utilization for three access points labeled "API", "AP2" and "AP3".
5 shows a noise matrix for each access point of a communication system, wherein the access point and one or more client devices include adaptive antenna systems.
6 shows a flow diagram of a process for optimizing channel selection per access point or node in a communication system, along with selection of an optimal active steering mode for adaptive antennas.
7 shows channel utilization for four access points labeled “API”, “AP2”, “AP3” and “AP4”.
8 each depicts a network communication system for servicing wireless communication links between a network and each of a plurality of client devices.

The present invention relates to an adaptive antenna system that provides multiple radiation modes that can be sampled and selected to improve communication link performance in WLAN and other communication systems. This adaptive antenna system provides an additional parametric that optimizes noise levels of receivers within access points and other transceivers implemented in communication systems and communicates in multipath and dynamic environments. It can be used to provide higher SINR which improves data throughput and stability in maintaining links.

In one embodiment, an adaptive antenna capable of generating a plurality of radiation modes is combined with an algorithm implementing a sampling process that selects an optimal radiation mode for an intended communication link. This technique is well suited for implementation in WLAN systems where multiple access points work to provide coverage in a specific area and have to resolve interference between access points. With the ability to change the radiation modes of an antenna system used in conjunction with the access points, this technique can be used to improve SINR levels at the access points of the system by selecting modes that reduce signal strength levels in the direction of adjacent nodes. . This ability to change the radiation modes of an antenna system also affects how adjacent channels interfere with each other. Thus, using this technique in (i) devices only, (ii) access point(s) only, or (iii) both devices and access point(s) provides an additional degree of freedom in the channel allocation process, resulting in an overall Network performance is maximized.

In one embodiment, a communication system consisting of two nodes (access points), each node including a transceiver and an antenna system, is used to provide wireless communication in a defined area. An example of this type of system is a WLAN system consisting of two access points (nodes) to provide wireless coverage within a building. The first access point operates on channel A, while the second access point operates on channel B, and channels A and B occupy different portions of the frequency spectrum. The first access point of the system comprises an adaptive antenna system with such an adaptive antenna system defined as an antenna capable of generating multiple radiation modes (beam steered or null steered possible), whereas the second access point It includes a passive antenna system with a fixed radiation pattern. Each radiation mode of the adaptive antenna system has an associated radiation pattern, which radiation pattern varies between modes in terms of radiation pattern shape and/or polarization properties. A candidate antenna for an adaptive antenna is a modal antenna, which can generate multiple radiation patterns from a single port antenna. A network controller is implemented to instruct and control the network of access points. An algorithm resides on the computer of the network controller, which algorithm adapts at the first access point by adjusting the reactance or switching on/off the reactance of active components such as, for example, switches, tunable capacitors, tunable inductors, etc. It aims to control the radiation modes of the type antenna system. The communication link quality between the two access points and each client of the system is measured and stored in memory. An algorithm implemented with an adaptive antenna samples a channel quality indicator (CQI) metric or radiation patterns such as Signal to Interference and Noise Ratio (SINR), Receive Signal Strength Indicator (RSSI), and Modulation Coding Scheme (MCS), and the CQI Provides the ability to examine similar metrics obtained from the baseband processor of a communication system to provide the ability to make decisions regarding operation for an optimal radiation pattern or mode based on . Optimization may be performed to improve the SINR of the second access point by selecting radiation modes for the adaptive antenna system associated with the first access point when the first access point communicates with clients in the system. Although the two access points operate on different channels, there is a finite roll-off in the frequency response in which some residual out-of-band frequency components from the first access point are coupled with the receive port of the second access point. For example, the optimization may be performed in the first access point by selecting a different channel for different antenna modes of all devices connected to this access point, monitoring signal quality metrics such as SINR, and the like.

The improvement in SINR occurs when the modes of the adaptive antenna are selected to provide service to the intended client while coupling less power to the receive port of the second access point. As a result, the throughput, range and capacity of the communication links established between the clients and the second access point of the system are improved.

In another embodiment, the communication system as described above is implemented where adaptive antenna systems are integrated in both the first access point and the second access point. An algorithm resident on a computer in the network controller performs the task of controlling the radiation modes of the adaptive antenna systems at the first access point and the second access point. A first access point operates on channel A, a second access point operates on channel B and channels A and B occupy different portions of the frequency spectrum. Improving the SINR of the first and second access points by selecting radiation modes for adaptive antenna systems associated with the first and second access points, respectively, when the access points communicate with clients of the system optimization may be performed.

In another embodiment, a plurality of access points are fielded in a communication system, the plurality of access points including adaptive antenna systems. An algorithm resident in the network controller controls all adaptive antenna systems in the network, the goal of which is to select radiation modes that combine from one access point to an adjacent access point when communication links are established between the access points and clients. This increases the SINR at the receive ports of all access points in the system.

In another embodiment, the plurality of access points as well as the plurality of clients are each configured with an adaptive antenna system to provide a plurality of radiation modes across communication links established in the network. An algorithm resident in the network controller controls all adaptive antenna systems in the network, the goal of which is to select radiation modes that combine from one access point to an adjacent access point when communication links are established between the access points and clients. This increases the SINR at the receive ports of all access points in the system. Adaptive antenna systems of client devices provide an additional parameter to adjust during the optimization process.

In yet another embodiment, a plurality of access points are fielded in a communication system, wherein a plurality of these access points comprise adaptive antenna systems, wherein at least two access points are adjacent to each other and operate on the same channel. The algorithm residing in the network controller works in the same manner as previously described, and the end result is by selecting radiating modes that combine from one access point to an adjacent access point when communication links are established between the access points and clients. Improving the SINR at the receive ports of all access points in the system.

The algorithm described in the previously mentioned embodiments is configured to investigate the radiation modes of all adaptive antenna systems in the network. The communication link quality between all adaptive antenna capable access points and each client of the system is measured and stored in memory. An algorithm implemented with an adaptive antenna samples a channel quality indicator (CQI) metric or radiation patterns such as Signal to Interference and Noise Ratio (SINR), Receive Signal Strength Indicator (RSSI), and Modulation Coding Scheme (MCS), and the CQI Provides the ability to examine similar metrics obtained from the baseband processor of a communication system to provide the ability to make decisions regarding operation for an optimal radiation pattern or mode based on . Optimization may be performed to improve the SINR of communication links established between access points and clients in a network by selecting radiation modes for adaptive antenna systems associated with access points and clients within the system. This algorithm adds a noise matrix for each access point in the network to which the adaptive antenna system is connected. An average noise measurement is performed for each communication link between the access point and the clients in the network and these noise values are stored in a noise matrix. A noise matrix associated with each access point in the network is examined by an algorithm, and radiation mode states for the adaptive antenna system are selected for the access points or for access point/client pairs, so that the receiver in the access points and clients The noise levels in the fields are respectively minimized. The noise matrix is continuously updated to account for changes in the propagation channel and channel changes at the access points.

Turning now to the drawings, FIG. 1 shows four radiation pattern modes of a single modal antenna. A modal antenna can create multiple radiation patterns (shown as four, but there could be more). The four radiation modes shown provide peak gain coverage in four separate directions (D1; D2; D3 and D4).

2 includes a network controller, two access points comprising a first access point labeled “API” and a second access point labeled “AP2”, and four client devices wirelessly connected to the two access points; A communication system is shown. Each access point is aware of all devices. However, the "mode" of each access point's adaptive antenna systems can be configured to optimize system throughput, allowing the mode to identify unintended links (e.g., nulls in the radiation pattern of a particular selected mode) The link points in the direction of the undesirable client device), and also the mode prioritizes link communication with the intended client devices (eg, the gain maximum of the radiation pattern is the client device needing the link). steered towards). Here, the first access point (API) is configured in a first mode, and the first mode is a mode for setting a gain in the direction of intended clients (device 1 and device 3), whereas unintended client devices ( Links with device 2 and device 4) are excluded at the same time. However, the second access point AP2 is configured in the second mode such that a link with the intended clients (device 2 and device 4) is established, while at the same time the second mode is configured with unintended clients (device 1 and device 4). Distinguish the link with device 3). In this regard, all devices (devices 1 to 4) are services on the network, but the throughput is evenly distributed among the access points and devices on the network, and the adaptive antenna of the first access point and the second access point This is accomplished by the control provided by the network controller to configure the systems.

3 shows channel utilization for three access points labeled "API", "AP2" and "AP3". The frequency response for each access point is indicated along with the SINR. As can be seen from the figure, the effective noise floor of each access point is limited or set by the frequency components generated by other access points in the communication system. Antenna systems used with these three access points include traditional passive antennas, each passive antenna having a single radiation mode or radiation pattern (as opposed to the multiple reconfigurable antenna modes of a modal antenna).

4 shows channel utilization for three access points labeled "API", "AP2" and "AP3". The three access points have adaptive antenna systems, which are capable of generating multiple radiation modes, the antenna system generating a distinct radiation pattern when configured in each of the plurality of modes. The frequency response for each access point is shown along with the SINR of the three adaptive steering modes generated by the adaptive antenna system of each access point. In active steering modes that provide a different radiation pattern and/or polarization state than the adaptive antenna system, the SINR will vary from one mode to the next. The mode that provides the highest SINR may be selected and used for communication between the access point and the client device to improve communication performance. Also, adaptive steering modes may be investigated for multiple channels for each access point, and channel selection for access points may be performed in conjunction with adaptive steering mode selection. The result is improved SINR performance at each access point due to improved frequency response roll-off when optimal channel selection and adaptive steering mode selection are performed.

5 shows a noise matrix for each access point of a communication system, wherein the access point and one or more client devices include adaptive antenna systems. The average noise level at the receiver of the access point and the receivers of the client devices may be determined as active steering modes of the adaptive antenna systems are sampled. This noise matrix provides a database to look at when selecting the optimal channels for access points in the system and an adaptive steering mode to use per client.

6 shows a flow diagram of a process for optimizing channel selection per access point or node in a communication system, along with selection of optimal active steering modes for adaptive antennas.

7 shows channel utilization for four access points labeled "API", "AP2", "AP3" and "AP4". The frequency response for each access point is shown with "AP1" and "AP4" operating on the same channel. The optimal active steering mode for the frequency response of each access point is indicated.

8 shows a network communication system for servicing wireless communication links between each of a plurality of client devices 31 ; 32 ; 33 ; 34 and a network, respectively. A network communication system for servicing wireless communication links between each of a plurality of client devices and a network may include, respectively, a first access point 10 , a second access point 20 , and a network controller 40 . . The first access point may include an adaptive antenna system 100 associated therewith, the adaptive antenna system being configurable in one of a plurality of possible modes, wherein the adaptive antenna system is configured in each of the plurality of possible modes. It shows distinct radiation patterns 101a to 101d when configured in . The network controller 40 may be configured to execute an algorithm 50 for determining an optimal mode of the adaptive antenna system 100 for a specified time, the algorithm comprising: (i) to the first access point, the examining each of a plurality of client devices available for communication with a network, (ii) configuring an adaptive antenna system of a first access point in each of a plurality of possible modes, and, for each mode, a first Measuring a channel quality indicator (CQI) associated with each of the adaptive antenna system of the access point and a plurality of client devices, (iii) antenna mode data corresponding to each mode, device, and CQI of the measured adaptive antenna system storing on a network, (iv) selecting an optimal mode from among a plurality of possible modes based on the antenna mode data, and (v) configuring an adaptive antenna system of the first access point in the optimal mode. include

The second access point 20 is shown comprising a second passive antenna 200 having a fixed radiation pattern 201a. However, as discussed above, the second antenna may alternatively include an adaptive antenna system.

An adaptive antenna system may be characterized by a radiating element, one or more parasitic elements positioned adjacent to the radiating element, and one or more active tuning components, each of the one or more active tuning components coupled to one of the one or more parasitic elements. and is configured to adjust the current mode of each parasitic element.

The active tuning components may be individually selected from the group consisting of switches, tunable capacitors, tunable inductors, MEMs devices, tunable phase shifters and diodes.

The second access point may include a second adaptive antenna system configurable in one of a plurality of possible second modes associated therewith, wherein the second adaptive antenna system is configured in each of a plurality of possible second modes. It shows a distinct radiation pattern.

A network communication system may include three or more access points.

The optimal mode may be one of a plurality of possible modes that achieve the maximum throughput of the network. The optimal mode may be one of a plurality of possible modes for achieving priority throughput according to network preference for individual device throughput.

Maximum throughput can be achieved when balancing the device load between each access point in the network. Maximum throughput is achieved by balancing the device load across each channel of each access point in the network.

The antenna mode data further includes frequency or channel information.

As described above, the CQI may be selected from the group consisting of Signal to Interference and Noise Ratio (SINR), Receive Signal Strength Indicator (RSSI), Modulation Coding Scheme (MCS), or other similar metrics.

In some embodiments, the communication system comprises: a first radio frequency transceiver operating at frequency Fl; a first antenna system coupled to the first transceiver; a second radio frequency transceiver operating at frequency F2; a second antenna system coupled to the second transceiver; a network controller for command and control of the first and second transceivers; each client device comprising a plurality of client devices comprising a transmitter, receiver or transceiver capable of operating at a frequency F1 or F2 or both F1 and F2, wherein a first antenna system coupled to the first transceiver comprises an adaptive antenna A system, wherein the adaptive antenna system is capable of generating two or more radiation modes, each radiation mode having a different radiation pattern and/or polarization compared to the other modes, and an algorithm resides in a network controller, said algorithm controls changes in radiation modes of the adaptive antenna system as well as the channel used by each access point of the network, wherein the first transceiver uses the radiation modes of the adaptive antenna system to communicate link with one or a plurality of client devices examining the communication link metrics as establishing to select a radiation mode for the adaptive antenna system connected to the first transceiver when establishing a communication link with the first transceiver when establishing a communication link with the first client that provides the minimum noise level at the receiver of the second transceiver. is composed

According to an embodiment of the communication system, a plurality of frequencies are available for transmission and reception, and an algorithm resident in the network controller changes the radiation modes of the adaptive antenna system as well as the channel used by each access point in the network. control and examine a communication link metric as the first transceiver establishes a communication link with the one or plurality of client devices using the radiation modes of the adaptive antenna system, and wherein the second transceiver communicates with the one or plurality of client devices. examining the communication link metrics as establishing the communication link of and select a radiation mode for an adaptive antenna system coupled to the first transceiver when establishing a communication link with a providing first client, wherein the examination of communication link metrics for various modes is performed at two or more frequencies; The optimal frequency selected for the first transceiver and the second transceiver operates with a minimum noise level at the receivers of the first and second transceivers.

In another embodiment, the second antenna system coupled to the second transceiver is an adaptive antenna system, the adaptive antenna system being capable of generating two or more radiation modes, each radiation mode being different as compared to the other modes. The algorithm having a radiation pattern and/or polarization, and residing in the network controller, controls changes in radiation modes of the first and second adaptive antenna systems as well as the channel used by each access point of the network, the first Investigate a communication link metric as the transceiver establishes a communication link with one or a plurality of client devices using the radiation modes of the adaptive antenna system, and wherein the second transceiver uses the radiation modes of the adaptive antenna system to enable one or more examines the communication link metrics as it establishes a communication link with the client device of selecting a radiation mode for an adaptive antenna system coupled to the first transceiver when establishing a communication link with the first client, and selecting a radiation mode for the adaptive antenna system coupled to the first transceiver when the first transceiver establishes a communication link with the first client device at equal time intervals. wherein the transceiver is configured to select a radiation mode for an adaptive antenna system coupled to the second transceiver when the transceiver establishes a communication link with a second client that provides a minimum noise level at the receiver of the first transceiver, wherein the communication link for various modes Investigation of the metric is performed at two or more frequencies, wherein the optimal frequency selected for the first and second transceivers operates with a minimum noise level at the receivers of the first and second transceivers.

In various embodiments, the communication link metric samples a Channel Quality Indicator (CQI) metric or radiation patterns such as Signal to Interference and Noise Ratio (SINR), Receive Signal Strength Indicator (RSSI), Modulation Coding Scheme (MCS), and It provides the ability to examine similar metrics obtained from a baseband processor of a communication system to provide the ability to make decisions regarding operation for an optimal radiation pattern or mode based on the CQI.

The algorithm may reside on a processor co-located with the first or second transceiver. The algorithm may reside on a processor co-located with the first or second adaptive antenna system.

Certain embodiments may include a plurality of transceivers with one or more transceivers having adaptive antenna systems coupled thereto, wherein an algorithm resident in the network controller controls selection of radiation modes of all adaptive antenna systems in the communication system. and examine the communication link metrics for all transceivers having adaptive antenna systems as the transceivers establish communication links with client devices using the radiation modes of the adaptive antenna systems, and at least in the transceivers of the communication system. and select a transceiver/client pairing to establish communication links concurrently with other transceivers of the communication system such that the noise level is optimized.

Certain embodiments also provide that an algorithm resident in the network controller controls the selection of radiation modes of all adaptive antenna systems in the communication system, and the transceivers use the radiation modes of the adaptive antenna systems to communicate link with client devices. Investigate communication link metrics for all transceivers with adaptive antenna systems as setting /selecting frequency channels for the transceivers for client pairings.

Certain embodiments may also include the first and second radio frequency transceivers operating at frequency F1. Certain embodiments may also include two or more transceivers with adaptive antenna systems operating at frequency F1.

While this invention contains many details, these should not be construed as limitations on the scope of the invention or of what may be claimed, but as descriptions of features specific to particular embodiments of the invention. Certain features that are described in this document in connection with separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable subcombination. Moreover, although features may be described as functioning in particular combinations, and even initially so claimed, one or more features of a claimed combination may in some cases be exercised in a combination, and the claimed combination may be It may relate to a variant of a combination or sub-combination.

Claims (11)

A network communication system for servicing wireless communication links between each of a plurality of client devices and a network, comprising:
The network communication system comprises:
a first access point configured to operate on a first channel;
a second access point configured to operate on a second channel different from the first channel; and
a network controller;
the first access point comprises an adaptive antenna system associated with the first access point, the adaptive antenna system being configurable in one of a plurality of possible modes, the adaptive antenna system represents a distinct radiation pattern when configured in each of the plurality of possible modes; And
the network controller executes an algorithm for determining a selected mode of the adaptive antenna system during a specific time period;
The algorithm is:
interrogating, with the first access point, each of a plurality of client devices available for communication with the network;
configure the adaptive antenna system of the first access point in each of the plurality of possible modes, and for each mode, a CQI associated with the adaptive antenna system of the first access point and each of the plurality of client devices Measuring (channel quality indicator) and;
storing antenna mode data corresponding to each mode, device and CQI of the adaptive antenna system on the network;
selecting one of the plurality of possible modes as a selected mode for an adaptive antenna system of the first access point based on the antenna mode data, wherein the selected mode improves the CQI at the second access point is chosen for - with; And
configuring an adaptive antenna system of the first access point in the selected mode;
the selected mode is one of a plurality of possible modes that achieve a maximum throughput of the network;
The maximum throughput of the network is achieved when balancing a device load between each channel of the first access point and the second access point,
When the adaptive antenna system is configured in a selected mode, a radiation pattern associated with the selected mode is configured such that a null of the radiation pattern is directed toward one or more of the plurality of client devices in communication with the second access point. steered, and
wherein the noise floor of the first access point is limited by one or more frequency components generated by the second access point.
network communication system. According to claim 1,
The adaptive antenna system may include a radiating element, one or more parasitic elements positioned proximate the radiating element, and one or more active tuning components, each of the one or more active tuning components being configured to be configured in one of the one or more parasitic elements. coupled and configured to adjust the current mode of each of the parasitic elements.
network communication system. 3. The method of claim 2,
wherein the active tuning components are individually selected from the group consisting of switches, tunable capacitors, tunable inductors, MEMs devices, tunable phase shifters and diodes.
network communication system. The method of claim 1,
The second access point comprises a second adaptive antenna system configurable in one of a plurality of possible second modes associated with the second access point, the second adaptive antenna system being configured to be configured in the plurality of possible second modes. characterized in that each exhibits a distinct radiation pattern when constructed in
network communication system. 5. The method of claim 4,
characterized in that it includes three or more access points
network communication system. delete delete delete According to claim 1,
The antenna mode data, characterized in that it further includes frequency or channel information
network communication system. According to claim 1,
wherein the selected mode is one of a plurality of possible modes for achieving priority throughput according to network preference for individual device throughput.
network communication system. According to claim 1,
The CQI, characterized in that selected from the group consisting of SINR (Signal to Interference and Noise Ratio), RSSI (Receive Signal Strength Indicator), and MCS (Modulation Coding Scheme)
network communication system.

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