Circuit, method, and related apparatus for avoiding channel interference

Patent metadata

Field	Value
Publication number	US-9485713-B2
Application number	US-201514954126-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Sep 18, 2013
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

A circuit for avoiding channel interference, including a Wireless Fidelity (Wi-Fi) chip and at least one first single-pole multi-throw switch, where a movable end of the first single-pole multi-throw switch is connected to a signal transmit pin of the Wi-Fi chip; one non-movable end of the first single-pole multi-throw switch is connected to a first signal transmit tributary while another is connected to a second signal transmit tributary; and when the Wi-Fi chip determines that a first channel and a second channel interfere with each other, the movable end of the first single-pole multi-throw switch is controlled to connect to the second non-movable end of the first single-pole multi-throw switch, where the first channel is a wireless local area network channel, and the second channel is different from the wireless local area network channel.

First claim

What is claimed is:

1. A circuit for avoiding channel interference, comprising:
a wireless local area network Wireless Fidelity (Wi-Fi) chip; and
at least one first single-pole multi-throw switch,
wherein a movable end of the first single-pole multi-throw switch is connected to a signal transmit pin of the Wi-Fi chip, wherein the first single-pole multi-throw switch comprises at least two non-movable ends, wherein a first non-movable end of the at least two non-movable ends is connected to a first signal transmit tributary, wherein a second non-movable end of the at least two non-movable ends is connected to a second signal transmit tributary, wherein the second signal transmit tributary comprises a power attenuator, wherein an input end of the power attenuator is connected to the second non-movable end of the first single-pole multi-throw switch, wherein, when the Wi-Fi chip determines that a first channel and a second channel interfere with each other, the movable end of the first single-pole multi-throw switch is controlled to connect to the second non-movable end of the first single-pole multi-throw switch, wherein the first channel is a wireless local area network channel, and wherein the second channel is different from the wireless local area network channel.

2. The circuit according to claim 1 , wherein the circuit further comprises a second single-pole multi-throw switch, wherein a band-pass filter and a radio-frequency signal transceiver antenna are sequentially connected in series to a movable end of the second single-pole multi-throw switch, wherein a first non-movable end of the second single-pole multi-throw switch is connected to the first non-movable end of the first single-pole multi-throw switch, wherein an output end of the power attenuator is connected to the first non-movable end of the second single-pole multi-throw switch, wherein a second non-movable end of the second single-pole multi-throw switch is connected to a signal receive pin of the Wi-Fi chip using the band-pass filter, and wherein the second single-pole multi-throw switch connects, under control of a connection control signal transmitted by the Wi-Fi chip, the movable end of the second single-pole multi-throw switch and the first or second non-movable end of the second single-pole multi-throw switch.

3. The circuit according to claim 2 , wherein that the first non-movable end of the second single-pole multi-throw switch is connected to the first non-movable end of the first single-pole multi-throw switch comprises that the first non-movable end of the second single-pole multi-throw switch is connected to a movable end of a third single-pole multi-throw switch and that a first non-movable end of the third single-pole multi-throw switch is connected to the first non-movable end of the first single-pole multi-throw switch, and wherein that the output end of the power attenuator is connected to the first non-movable end of the second single-pole multi-throw switch comprises that the output end of the power attenuator is connected to a second non-movable end of the third single-pole multi-throw switch and that the movable end of the third single-pole multi-throw switch is connected to the first non-movable end of the second single-pole multi-throw switch, and wherein the third single-pole multi-throw switch connects, under control of a connection control signal transmitted by the Wi-Fi chip, the movable end of the third single-pole multi-throw switch and the first or second non-movable end of the third single-pole multi-throw switch.

4. The circuit according to claim 3 , wherein the second single-pole multi-throw switch is a single-pole triple-throw switch.

5. The circuit according to claim 1 , wherein the first single-pole multi-throw switch and the power attenuator are comprised in a two-level adjustable attenuator.

6. A method for avoiding channel interference, comprising:
determining, by an access hotspot access point (AP), whether a Wireless Fidelity (Wi-Fi) signal transmitted by a signal transmit pin of a Wi-Fi chip disposed in a mobile wireless local area network (Mobile Wi-Fi) terminal generates interference to a signal of a communications standard different from a Wi-Fi communications standard; and
transmitting, by the AP, the Wi-Fi signal using the signal transmit pin, when it is determined that the Wi-Fi signal transmitted by the signal transmit pin of the Wi-Fi chip disposed in the Mobile Wi-Fi terminal generates interference to the signal of the communications standard different from the Wi-Fi communications standard, after a movable end of a first single-pole multi-throw switch that is connected to the signal transmit pin is controlled to connect to a second non-movable end of the first single-pole multi-throw switch,
wherein the movable end of the first single-pole multi-throw switch is connected to the signal transmit pin, wherein the first single-pole multi-throw switch comprises at least two non-movable ends, wherein a first non-movable end of the at least two non-movable ends is connected to a first signal transmit tributary, wherein the second non-movable end of the at least two non-movable ends is connected to a second signal transmit tributary, wherein the second signal transmit tributary comprises a power attenuator, and wherein an input end of the power attenuator is connected to the second non-movable end of the first single-pole multi-throw switch.

7. A method for avoiding channel interference, comprising:
determining, by a mobile wireless local area network (Mobile Wireless Fidelity (Wi-Fi)) terminal in which a Wi-Fi chip is disposed, whether a first Wi-Fi signal transmitted using a signal transmit pin of the Wi-Fi chip generates interference to a signal of a communications standard different from a Wi-Fi communications standard; and
transmitting, by the Mobile Wi-Fi terminal, the first Wi-Fi signal using the signal transmit pin when a result of the determining is that the first Wi-Fi signal transmitted using the signal transmit pin of the Wi-Fi chip generates the interference to the signal of the communications standard different from the Wi-Fi communication standard, after a movable end of a first single-pole multi-throw switch that is connected to the signal transmit pin and a second non-movable end of the first single-pole multi-throw switch are controlled to be connected,
wherein the movable end of the first single-pole multi-throw switch is connected to the signal transmit pin, wherein the first single-pole multi-throw switch comprises at least two non-movable ends, wherein a first non-movable end of the at least two non-movable ends is connected to a first signal transmit tributary, wherein the second non-movable end of the at least two non-movable ends is connected to a second signal transmit tributary, wherein the second signal transmit tributary comprises a power attenuator, and wherein an input end of the power attenuator is connected to the second non-movable end of the first single-pole multi-throw switch.

8. The method according to claim 7 , wherein after the transmitting, by the Mobile Wi-Fi terminal, the first Wi-Fi signal using the signal transmit pin, the method further comprises:
determining, by the Mobile Wi-Fi terminal by scanning a frequency band that does not generate interference to a frequency band used by the signal of the communications standard different from the Wi-Fi communications standard and is used by a Wi-Fi signal that can be transmitted by the Wi-Fi chip, whether there is a second Wi-Fi signal that uses the frequency band that does not generate interference to the frequency band used by the signal of the communications standard different from the Wi-Fi communications standard;
requesting, by the Mobile Wi-Fi terminal, to acces

Assignees

• Huawei Device Co Ltd

Inventors

• Zhao Yu
• Chen Chonglu
• Chen Dong
• Zhang Xiaofeng
• Xiang Chao
• Wen Xiaoyu

Classifications

• H04W48/06 Primary

  based on traffic conditions · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04B17/345

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04W84/04

  Large scale networks; Deep hierarchical networks · CPC title