CN101465678A - Automatic control method for emission power of WLAN system - Google Patents

Automatic control method for emission power of WLAN system Download PDF

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Publication number
CN101465678A
CN101465678A CNA2007103037347A CN200710303734A CN101465678A CN 101465678 A CN101465678 A CN 101465678A CN A2007103037347 A CNA2007103037347 A CN A2007103037347A CN 200710303734 A CN200710303734 A CN 200710303734A CN 101465678 A CN101465678 A CN 101465678A
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CN101465678B (en
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徐海军
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Beijing CEC Huada Electronic Design Co Ltd
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Beijing CEC Huada Electronic Design Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The invention provides an easy-implementation transmission power automatic control method for WLAN system, which aims to improve communication quality and suppresses transmission power in certain degree, and further reduces the electronic irradiation degree. The main principle includes that the effective transmission distance between stations is estimated according to signal intensity of the counterpart signal, so the corresponding transmission power is set. The method is an open-loop control method and has simple structure and is easy in implementation, avoids software in control process and is applicable to all system environments. The invention can provide a more feasible power consumption control design for WLAN chips.

Description

A kind of transmitting power autocontrol method that is used for wlan system
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of wireless LAN communication chip.
Background technology
The trend of low power dissipation design is constantly soaring in recent years, and the low-power consumption product has become the main flow on the market, so the low power dissipation design in the product is most important.In WLAN chips, radio-frequency power consumption occupies very big ratio, so the transmitting power of control radio frequency can effectively be controlled the power consumption of whole system.
Existing most of product is not all done the control of automatic transmitting power, be artificial setting emitting power grade, this function is to have certain requirements to the user, that is to say that the user must understand the meaning of this parameter, could carry out correct setting to it then, certain limitation is arranged.The artificial emitting power grade of setting is not accomplished real-time adjustment, defines the steric requirements of communication yet, if set the ceiling capacity emission, the emission of setting least energy then will reduce the shortest communication distance between website, and if then will reduce the communication distance farthest between website.
Though also have the minority product also to design the controlled function of automatic transmitting power, its great majority all are to need software to be used, this also is unfavorable for application on the embedded platform.
Summary of the invention
The invention provides a kind of transmitting power autocontrol method that is easy in the hard-wired wlan system, can control the emission power consumption in real time, need not software in the process participates in, when effectively controlling power consumption, radio-frequency (RF) component is operated in the maximum limit range, reaches maximum dynamic communication distance.Main purpose is to improve communication quality, and can suppress transmitting power to a certain extent, and then reduces the electron radiation degree.Cardinal principle is to estimate effective propagation path between website according to the signal energy of the other side's website of receiving, and then sets corresponding transmission power.
The advantage of this method:
● open loop control, simple in structure, be easy to hardware and realize;
● can reduce power consumption to a certain extent;
● need not software in the control procedure and participate in, go for all system environmentss.
Description of drawings
Fig. 1 is the realization flow figure that is used for the transmitting power autocontrol method of wlan system.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
The invention provides a kind of hard-wired transmitting power autocontrol method that is used for wlan system that is easy to, main purpose is to improve communication quality, and can suppress transmitting power to a certain extent, and then reduces the electron radiation degree.Cardinal principle is according to the effective propagation path between the signal strength signal intensity estimation website of the other side's website, and then sets corresponding transmission power.
Under the normal condition, space channel is reciprocity, and the emission maximum energy of website is 20dBm, minimum emitted energy is-10dBm, the optimum received energy scope of website is [55dBm ,-20dBm], and target of the present invention is exactly to allow receiver be in the optimum received energy scope.Below be described in detail with regard to the transmitting power setting under every kind of received energy scope.STA represents website, STA 1Represent our website, STA 2Expression the other side website.The signal energy that the RSSI finger is received, the signal energy that our website receives is with RSSI 1Expression, the signal energy that the other side's website receives is with RSSI 2Expression.
● work as RSSI 1∈ (25dBm, 0dBm] time
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 25dBm, then space attenuation is 35dBm, and this moment STA 1With-emission of 10dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 10dBm, then space attenuation is 0dBm (space attenuation is more than or equal to 0dBm), and this moment STA 1With-emission of 10dBm energy, then RSSI 2Equal-10dBm.Under this kind situation, RSSI 2∈ (25dBm ,-10dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-25dBm, then space attenuation is 45dBm, and STA 1With-emission of 10dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal 0dBm, then space attenuation is 20dBm, and STA 1With-emission of 10dBm energy, then RSSI 2Equal-30dBm.Under this kind situation, RSSI 2∈ (55dBm ,-30dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-10dBm].
In this case, STA 1Should could guarantee STA with the emission of-10dBm energy 2Be in best accepting state, and can reach the working limit of RF.
● work as RSSI 1∈ (30dBm ,-25dBm] time
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 30dBm, then space attenuation is 20dBm, and this moment STA 1With-emission of 5dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 25dBm, then space attenuation is 15dBm, and this moment STA 1With-emission of 5dBm energy, then RSSI 2Equal-20dBm.Under this kind situation, RSSI 2∈ (25dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-30dBm, then space attenuation is 50dBm, and STA 1With-emission of 5dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal-25dBm, then space attenuation is 45dBm, and STA 1With-emission of 5dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (55dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-20dBm].
In this case, STA 1Should could guarantee STA with the emission of-5dBm energy 2Be in best accepting state.
● work as RSSI 1During ∈ [35dBm ,-30dBm]
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 35dBm, then space attenuation is 25dBm, and this moment STA 1With the emission of 0dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 30dBm, then space attenuation is 20dBm, and this moment STA 1With the emission of 0dBm energy, then RSSI 2Equal-20dBm.Under this kind situation, RSSI 2∈ (25dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-35dBm, then space attenuation is 55dBm, and STA 1With the emission of 0dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal-30dBm, then space attenuation is 50dBm, and STA 1With the emission of 0dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (55dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-20dBm].In this case, STA 1Should could guarantee STA with the emission of 0dBm energy 2Be in best accepting state.
● work as RSSI 1During ∈ [40dBm ,-35dBm]
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 40dBm, then space attenuation is 30dBm, and this moment STA 1With+emission of 5dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 35dBm, then space attenuation is 25dBm, and this moment STA 1With+emission of 5dBm energy, then RSSI2 equals-20dBm.Under this kind situation, RSSI 2∈ (25dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-40dBm, then space attenuation is 60dBm, and STA 1With+emission of 5dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal-35dBm, then space attenuation is 55dBm, and STA 1With+emission of 5dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (55dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-20dBm].
In this case, STA 1Should could guarantee STA with the emission of+5dBm energy 2Be in best accepting state.
● work as RSSI 1During ∈ [45dBm ,-40dBm]
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 45dBm, then space attenuation is 35dBm, and this moment STA 1With+emission of 10dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 40dBm, then space attenuation is 30dBm, and this moment STA 1With+emission of 10dBm energy, then RSSI 2Equal-20dBm.Under this kind situation, RSSI 2∈ (25dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-45dBm, then space attenuation is 65dBm, and STA 1With+emission of 10dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal-40dBm, then space attenuation is 60dBm, and STA 1With+emission of 10dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (55dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-20dBm].
In this case, STA 1Should could guarantee STA with the emission of+10dBm energy 2Be in best accepting state.
● work as RSSI 1During ∈ [50dBm ,-45dBm]
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 50dBm, then space attenuation is 40dBm, and this moment STA 1With+emission of 15dBm energy, then RSSI 2Equal-25dBm; Work as RSSI 1Equal-during 45dBm, then space attenuation is 35dBm, and this moment STA 1With+emission of 15dBm energy, then RSSI 2Equal-20dBm.Under this kind situation, RSSI 2∈ (25dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-50dBm, then space attenuation is 70dBm, and STA 1With+emission of 15dBm energy, then RSSI 2Equal-55dBm; As if RSSI this moment 1Equal-45dBm, then space attenuation is 65dBm, and STA 1With+emission of 15dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (55dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (55dBm ,-20dBm].
In this case, STA 1Should could guarantee STA with the emission of+15dBm energy 2Be in best accepting state.
● work as RSSI 1During ∈ [100dBm ,-50dBm]
(1) if RSSI 1Be at STA 2With what obtain under-10dBm energy emission the situation, work as RSSI 1Equal-during 100dBm, then space attenuation is 90dBm, and this moment STA 1With+emission of 20dBm energy, then RSSI 2Equal-70dBm; Work as RSSI 1Equal-during 50dBm, then space attenuation is 40dBm, and this moment STA 1With+emission of 20dBm energy, then RSSI 2Equal-20dBm.Under this kind situation, RSSI 2∈ (70dBm ,-20dBm].
(2) work as RSSI 1Be at STA 2With what obtain under the 20dBm energy emission situation, as if RSSI this moment 1Equal-100dBm, then space attenuation is 120dBm, and STA 1With+emission of 20dBm energy, then RSSI 2Equal-100dBm; As if RSSI this moment 1Equal-50dBm, then space attenuation is 70dBm, and STA 1With+emission of 20dBm energy, then RSSI 2Equal-50dBm.Under this kind situation, RSSI 2∈ (100dBm ,-50dBm].
(3) work as RSSI 1Be at STA 2With what obtain under other energy emission situations, this moment RSSI 2∈ (100dBm ,-20dBm].
In this case, STA 1Should could guarantee STA with the emission of+20dBm energy 2Be in best accepting state, and can reach the working limit of RF.
By the transmitting power autocontrol method in the wlan system disclosed by the invention, can control the emission power consumption in real time, need not software in the process and participate in, when effectively controlling power consumption, radio-frequency (RF) component is operated in the maximum limit range, reaches maximum dynamic communication distance.
More than disclosed only be specific embodiments of the invention, but protection scope of the present invention is not limited thereto, any those skilled in the art can think variation all should drop in protection scope of the present invention.

Claims (2)

1. a transmitting power autocontrol method that is used for wlan system is characterized in that, according to the effective propagation path between the signal strength signal intensity estimation website of the other side's website, and then sets corresponding transmission power.
2. a kind of transmitting power autocontrol method that is used for wlan system according to claim 1 is characterized in that described method is an open-loop control method.
CN2007103037347A 2007-12-21 2007-12-21 Automatic control method for emission power of WLAN system Active CN101465678B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104185235A (en) * 2014-08-19 2014-12-03 小米科技有限责任公司 Method and device for adjusting wireless network
CN104684063A (en) * 2013-11-27 2015-06-03 联想(北京)有限公司 Communication method for controlling communication power and mobile station
US9215671B2 (en) 2010-02-11 2015-12-15 Huawei Device Co., Ltd. Routing device and signal transmitting method for wireless local area network
US9794896B2 (en) 2014-08-19 2017-10-17 Xiaomi Inc. Method and device for adjusting state of wireless network
CN109219123A (en) * 2018-09-30 2019-01-15 锐捷网络股份有限公司 A kind of method and wireless access point AP adjusting transmission power

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7088999B2 (en) * 2002-08-20 2006-08-08 Via Technologies, Inc. Personal communication device with transmitted RF power strength indicator
CN1592245A (en) * 2003-09-02 2005-03-09 皇家飞利浦电子股份有限公司 Power controlling method and apparatus for use in WLAN
US7359727B2 (en) * 2003-12-16 2008-04-15 Intel Corporation Systems and methods for adjusting transmit power in wireless local area networks

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9215671B2 (en) 2010-02-11 2015-12-15 Huawei Device Co., Ltd. Routing device and signal transmitting method for wireless local area network
CN104684063A (en) * 2013-11-27 2015-06-03 联想(北京)有限公司 Communication method for controlling communication power and mobile station
CN104185235A (en) * 2014-08-19 2014-12-03 小米科技有限责任公司 Method and device for adjusting wireless network
CN104185235B (en) * 2014-08-19 2016-01-06 小米科技有限责任公司 Wireless network method of adjustment and device
US9794896B2 (en) 2014-08-19 2017-10-17 Xiaomi Inc. Method and device for adjusting state of wireless network
CN109219123A (en) * 2018-09-30 2019-01-15 锐捷网络股份有限公司 A kind of method and wireless access point AP adjusting transmission power

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Address after: 102209 Beijing, Beiqijia, the future of science and technology in the south area of China electronic network security and information technology industry base C building,

Patentee after: Beijing CEC Huada Electronic Design Co., Ltd.

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Patentee before: Beijing CEC Huada Electronic Design Co., Ltd.