# US 9,883,443 B2 · Program for adjusting channel interference between access points in a wireless network

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- Number: US 9,883,443 B2
- Document ID: US9883443B2
- Status: Granted
- Kind: B2
- Application number: 14/242,262
- Filed: 2014-04-01
- Published: 2015-02-05
- Granted: 2018-01-30
- Earliest claimed: 2003-02-24
- Assignees: Xenogenic Development Limited Liability Company
- Applicants: Xenogenic Development Limited Liability Company
- Inventors: Floyd Backes; Gary Vacon; Paul Callahan; William R. Hawe; Roger Durand
- Web page: https://patentgrep.com/patent/US9883443B2

## CPC

- H04L 47/125: by balancing the load, e.g. traffic engineering
- H04W 4/02: Services making use of location information
- H04W 8/04: Registration at HLR or HSS [Home Subscriber Server]
- H04W 16/04: Traffic adaptive resource partitioning
- H04W 16/06: Hybrid resource partitioning, e.g. channel borrowing
- H04W 16/10: Dynamic resource partitioning
- H04W 28/0862: {of same hierarchy level}
- H04W 28/0983: {for optimizing bandwidth or throughput}
- H04W 28/16: Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W 28/22: Negotiating communication rate
- H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00)
- H04W 48/20: Selecting an access point
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 52/10: Open loop power control
- H04W 52/18: TPC being performed according to specific parameters
- H04W 52/225: {Calculation of statistics, e.g. average or variance}
- H04W 52/226: {using past references to control power, e.g. look-up-table}
- H04W 52/228: {using past power values or information}
- H04W 52/24: using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W 52/245: {taking into account received signal strength}
- H04W 52/246: {where the output power of a terminal is based on a path parameter calculated in said terminal}
- H04W 52/247: {where the output power of a terminal is based on a path parameter sent by another terminal}
- H04W 52/283: {Power depending on the position of the mobile}
- H04W 52/285: {taking into account the mobility of the user}
- H04W 52/286: {during data packet transmission, e.g. high speed packet access [HSPA]}
- H04W 52/287: {when the channel is in stand-by}
- H04W 52/288: {taking into account the usage mode, e.g. hands-free, data transmission or telephone}
- H04W 52/343: {taking into account loading or congestion level}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 52/50: at the moment of starting communication in a multiple access environment
- H04W 60/00: Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
- H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/52: based on load
- H04W 74/00: Wireless channel access
- H04W 74/002: {Transmission of channel access control information}
- H04W 80/04: Network layer protocols, e.g. mobile IP [Internet Protocol]
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04B 17/27: for locating or positioning the transmitter
- H04L 1/0002: {by adapting the transmission rate}
- H04L 67/1001: for accessing one among a plurality of replicated servers
- H04L 67/10015: {Access to distributed or replicated servers, e.g. using brokers}
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 24/00: Supervisory, monitoring or testing arrangements
- H04W 24/02: Arrangements for optimising operational condition
- H04W 28/02: Traffic management, e.g. flow control or congestion control
- H04W 28/04: Error control
- H04W 28/08: Load balancing or load distribution (transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)
- H04W 28/18: Negotiating wireless communication parameters
- H04W 36/08: Reselecting an access point
- H04W 36/18: for allowing seamless reselection, e.g. soft reselection
- H04W 36/20: for optimising the interference level
- H04W 40/08: based on transmission power
- H04W 40/18: based on predicted events
- H04W 40/36: due to handover
- H04W 48/06: based on traffic conditions
- H04W 48/16: Discovering, processing access restriction or access information
- H04W 48/17: {Selecting a data network PoA [Point of Attachment]}
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W 64/006: {with additional information processing, e.g. for direction or speed determination}
- H04W 72/54: based on quality criteria
- H04W 76/10: Connection setup
- H04W 80/00: Wireless network protocols or protocol adaptations to wireless operation
- H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W 84/22: with access to wired networks
- H04W 88/08: Access point devices
- H04W 92/18: between terminal devices
- H04W 92/20: between access points
- Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

## Claims

### Claim 1

An apparatus for use in a wireless network, comprising:
control circuitry; and
a variable power transmitter operable in response to the control circuitry to transmit wireless communication signals at a selected power level up to a maximum power level, and to transmit a signal with information indicative of a level of attenuation of the communication signals by the variable power transmitter relative to the maximum power level.

### Claim 2 (depends on 1)

The apparatus of claim 1 further including a receiver operative to receive, from a second wireless device, a signal with information indicative of level of attenuation of signals by the second wireless device relative to the maximum power level, and wherein the control circuitry is operative to store the information in a memory.

### Claim 3 (depends on 2)

The apparatus of claim 2 wherein the control circuitry is further operative to communicate with the second wireless device to select a power level for transmission of wireless signals.

### Claim 4

A method for operating a device in a wireless network, comprising:
selecting a power level at which to transmit wireless signals;
transmitting, from the device, communication signals at the selected power level; and
transmitting, from the device, a signal with information indicative of a level of attenuation of the communication signals relative to a maximum power level.

### Claim 5 (depends on 4)

The method of claim 4 including the further step of receiving, from a second wireless device, a signal with information indicative of level of attenuation of signals by the second wireless device relative to the maximum power level, and storing the information in a memory.

### Claim 6 (depends on 5)

The method of claim 5 including the further step of communicating with the second wireless device to select a power level for transmission of wireless signals.