Wireless operation in very high density environments

• US 10,368,318 B2
• Filed: 12/30/2010
• Issued: 07/30/2019
• Est. Priority Date: 12/30/2010
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lo, Waichi, Smith, Roland, Williams, Chris, Rayment, Stephen, Russell, Michael
• Primary Examiner(s): Patel, Parth
• Application Number:
  US12/982,081
• Publication Number:
  US 20120170514A1
• Time in Patent Office: 3,134 Days
• Field of Search: 370328, 370412-418, 455522
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001

Abstract

Protocols and algorithms for contention-based adaptive modulation networks, typically used in unlicensed bands. A wireless system in which high modulation rate packets are prioritized over low rate packets. The wireless system is configured to process communication signals from plural user portable devices having wireless access points capable of dynamically adjusting access point transmit power on a user-by-user basis to a minimum level required to achieve a target signal-to-noise ratio from each user portable device irrespective of the interference observed on the link is also disclosed. The wireless system is also capable of dynamically adjusting access point transmitter power and receiver sensitivity on a user-by-user basis to a minimum level required to achieve the highest possible modulation rate.

Claims

1. A transmitting Wi-Fi Access Point (AP) for use in a wireless network of Wi-Fi APs and user portable devices, the transmitting Wi-Fi AP comprising

processor that is configured to dynamically and continuously adjust, based on a power of the transmitting Wi-Fi AP measured at one or more receiving Wi-Fi APs in the network a transmitter power and a receiver sensitivity of the transmitting Wi-Fi AP, wherein the processor is further configured to adjust the transmitter power on a user-portable-device-by-user-portable-device basis, to a minimum level required to achieve the highest possible modulation rate in communications with user portable devices associated with the transmitting Wi-Fi AP.

2. The transmitting Wi-Fi AP according to claim 1, wherein the processor is configured to adjust the transmitter power and receiver sensitivity below a preset limit.

3. The transmitting Wi-Fi AP according to claim 1, wherein the transmitter power is adjusted such that each user portable device associated with the transmitting Wi-Fi AP receive only a power required to maintain a usable modulation rate.

4. The transmitting Wi-Fi AP according to claim 1, wherein the transmit power is adjusted to reduce interference caused by the transmitting Wi-Fi AP while maintaining the highest possible modulation rate for each associated user portable device.

5. The transmitting Wi-Fi AP according to claim 1, wherein the transmitter power is adjusted on a user-portable-device-by-user-portable basis based on a power received at the transmitting Wi-Fi AP from each respective user portable device.

6. The transmitting Wi-Fi AP according to claim 1, wherein the processor is further configured to receive from the one or more receiving Wi-Fi APs a message with an indication of the power of the transmitting Wi-Fi AP measured at the one or more receiving Wi-Fi APs.

7. The transmitting Wi-Fi AP according to claim 1 wherein the processor is configured to adjust the transmitter power and receiver sensitivity on a packet-by-packet basis.

8. A method for a transmitting Wi-Fi Access Point operating in a wireless network of Wi-Fi APs and user portable devices, the method comprising:

dynamically and continuously adjust, based on a power of the transmitting Wi-Fi AP measured at one or more receiving Wi-Fi APs in the network, a transmitter power and a receiver sensitivity of the transmitting Wi-Fi AP, wherein the transmitter power is further adjusted on a user-portable-device-by-user-portable-device basis, to a minimum level required to achieve the highest possible modulation rate in communications with user portable devices associated with the transmitting Wi-Fi AP.

9. The method according to claim 8, wherein the transmitter power and receiver sensitivity are adjusted below a preset limit.

10. The method according to claim 8, wherein the transmitter power is adjusted such that each user portable device associated with the transmitting Wi-Fi AP receives only a power required to maintain a usable modulation rate.

11. The method according to claim 8, wherein the transmitter power is adjusted on a user-portable-device-by-user-portable basis based on a power received at the transmitting Wi-Fi AP from each respective user portable device.

12. The method according to claim 8, further comprising receiving from the one or more receiving Wi-Fi APs a message with an indication of the power of the transmitting Wi-Fi AP measured at the one or more receiving Wi-Fi APs.

13. The method according to claim 8 wherein the transmitter power is adjusted to reduce interference caused by the transmitting Wi-Fi AP while maintaining the highest possible modulation rate for each associated user portable device.

14. The method according to claim 8 wherein the transmitter power is adjusted on a packet-by-packet basis.