CN105813077A - Communication method for reducing cost and terminal power consumption based on 802.11ah - Google Patents
Communication method for reducing cost and terminal power consumption based on 802.11ah Download PDFInfo
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- CN105813077A CN105813077A CN201610236170.9A CN201610236170A CN105813077A CN 105813077 A CN105813077 A CN 105813077A CN 201610236170 A CN201610236170 A CN 201610236170A CN 105813077 A CN105813077 A CN 105813077A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Small-Scale Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the field of wireless communication. In order to reducing the terminal wake time, reducing the conflicts, improving the throughput, reducing the energy consumption and improving the system performance, the communication method for reducing cost and terminal power consumption based on 802.11ah provided by the invention comprises following steps of A, with respect to stations which establish target wake time TWT dispatching with an access points AP, allowing the AP to manage the wake time of all stations STAs in a basic service set BSS, thus enabling the different STAs to wake for transmission at different time periods; B, with respect to the STAs without TWT dispatching with the AP, indicating the existence of a next TWT field by using one bit in the frame control filed of a control frame, thus enabling the STAs to synchronize with the time synchronization function of the AP, wherein the STAs do not receive beacons. The method is mainly applied to the wireless communication occasions.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to work station more time WLAN (WirelessLocalAreaNetwork, WLAN) Channel Access Mechanism TWT (TargetWakeTime, target wakeup time), specifically, reducing power consumption of terminal and reducing the improved method of field overhead based on 802.11ah (Internet of Things agreement) is related to.
Background technology
Along with the development of network technology, the demand of portability, moveable computer or work station is improved constantly by people, and mobile technology is increasingly subject to the favor of people.Owing to WLAN can carry out devices interconnect quickly, easily and flexibly thus realizing information transmission and resource-sharing, realize personal communication for us and provide desirable network platform solution, so being considered as one of the most promising technology of new century wireless communication field.
The advantages such as WLAN has low cost, height is handled up, industry maturation, application popularization so that it is become the important bearing technology supporting the Internet and Internet of Things development.But, the fast development of Internet of Things also proposes new challenge to WLAN, and the application of the Internet of Things such as intelligent grid, intelligent medical requires that wireless communication technology can provide more user, less energy expenditure, bigger coverage etc..
The main target studying WLAN energy-conservation is: can be properly received under the premise of packet in destination node, reduce the energy consumption of node as far as possible, extend the life-span of node and network；Adjust the transmitting power of node, reduce the interference to neighbor node, improve the handling capacity of network.
Owing to current most of wireless terminals are all battery powered (such as mobile phone, notebook computer, panel computers etc.), how effectively to reduce power consumption of terminal, extend the major issue that the use time is wireless local area network technology research all the time.
Summary of the invention
For overcoming the deficiencies in the prior art, reduce terminal wake-up time, reduce conflict raising handling capacity, reduce energy expenditure, improve systematic function.For this, the present invention adopts the technical scheme that, based on the 802.11ah communication means reducing cost reduction power consumption of terminal, comprises the following steps:
A, for access point AP (AccessPoint) set up target wakeup time TWT scheduling work station, allow AP to manage the recovery time at all working station STA (Station) in Basic Service Set BSS (BasicServiceSet), make different STA wake up in the different time periods and be transmitted；
B, for not setting up the STA of TWT scheduling with AP, be used in the frame control field of control frame bit to indicate the existence of next TWT field, in order to Tong Bu with AP time synchronized function and do not receive beacon.
Described step A includes:
A1, STA register relevant information by scanning, authentication, associated steps in AP, and AP is that STA distributes associated identifiers AID as identity；
A2, STA set up TWT agreement to AP application, are successfully established rear STA and are scheduling by TWT by AP；
A3, AP send beacon frame, and the information unit TWTIE (TWTInformationElement, TWT) in beacon frame comprises the wakeup time of one or more terminal；
In A4, first TWT scheduling, STA needs received beacon frame, determines that the current TWT form dispatched is dominant or recessive according to the TWTIE information carried；
A5, dominant TWT, TWT wakeup time is sent to STA by the Frame switch of AP next time；Recessive TWT, STA can calculate the wakeup time of next time by previously obtained TWT information.
Described step B includes:
B1, the STA that TWT agreement is set up in application with AP is not had to need and AP carries out Frame switch to determine the change of AP or to carry out time synchronized function synchronization with AP；
B2, the frame being used in control frame control a bit in FC (FrameControl) field to indicate the existence of next TWT field；
B3, next TWT field comprise control frame and receive the wakeup time value of target next time of STA, and therefore the presence or absence in control frame depends on whether this STA establishes TWT scheduling agreement with AP.
The feature of the present invention and beneficial effect:
Compared with prior art, the present invention is when work station quantity is more in a network, it is allowed to AP manages the wakeup time of node below BSS.In order to enable terminal node to save power consumption to greatest extent, it is necessary to make it close sending/receiving module as far as possible and enter into resting state, only wake up when having data to send or receiving.Target wakeup time TWT mechanism enables different terminals to wake up in the different time periods, thus reducing competition conflict, improving the service efficiency of system, being greatly reduced the power consumption of terminal node simultaneously.Meanwhile, use frame to control a bit in fc field and indicate the existence of next TWT field, to reduce the field overhead of non-TWTSTA control frame.Next TWT field is optionally present in control frame, next target wakeup time value of instruction recipient.
Accompanying drawing illustrates:
Fig. 1 is TWT schematic diagram.
Fig. 2 is the figure instruction of the TWTIE comprised in Beacon frame.
Fig. 3 is that TWT performs flow chart.
Fig. 4 is wireless communication system network configuration diagram.
Fig. 5 is that terminal adds flow through a network figure.
Detailed description of the invention
For WLAN terminal power consumption, battery durable problem, the present invention starts with from shortening terminal wake-up time angle, propose a kind of reducing power consumption of terminal and reducing the improved method of field overhead based on 802.11ah, reduce terminal wake-up time, reduce conflict raising handling capacity.When main thought is that work station quantity is more in a network, it is allowed to AP manages the wakeup time of node below BSS.In order to enable terminal node to save power consumption to greatest extent, it is necessary to make it close sending/receiving module as far as possible and enter into resting state, only wake up when having data to send or receiving.Target wakeup time TWT mechanism enables different terminals to wake up in the different time periods, thus reducing competition conflict, improving the service efficiency of system, being greatly reduced the power consumption of terminal node simultaneously.Meanwhile, use frame to control a bit in fc field and indicate the existence of next TWT field, to reduce the field overhead of non-TWTSTA control frame.Next TWT field is optionally present in control frame, next target wakeup time value of instruction recipient.While reducing energy expenditure, improve handling capacity by this method, improve systematic function.
The present invention proposes a kind of reducing power consumption of terminal and reducing the improved method of field overhead based on 802.11ah, and the method includes the steps of:
A, for AP (AccessPoint, access point) set up the target wakeup time TWT work station dispatched, AP is allowed to manage BSS (BasicServiceSet, Basic Service Set) in all STA (Station, work station) recovery time, make different STA wake up in the different time periods and be transmitted；
B, for not setting up the STA of TWT scheduling with AP, be used in the frame control field of control frame bit to indicate the existence of next TWT field, in order to Tong Bu with AP time synchronized function and do not receive beacon.
As the further improvement of described a kind of reduction power consumption of terminal based on 802.11ah the improved method reducing field overhead, described step A includes:
A1, STA register relevant information by scanning, authentication, associated steps in AP, and AP is that STA distributes associated identifiers AID as identity；
A2, STA set up TWT agreement to AP application, and being successfully established rear STA can be scheduling by TWT by AP；
A3, AP send beacon frame, and the TWTIE (TWTInformationElement, TWT information unit) in beacon frame comprises the wakeup time of one or more terminal；
In A4, first TWT scheduling, STA needs received beacon frame, determines that the current TWT form dispatched is dominant or recessive according to the TWTIE information carried；
A5, dominant TWT, TWT wakeup time is sent to STA by the Frame switch of AP next time；Recessive TWT, STA can calculate the wakeup time of next time by previously obtained TWT information.
As the further improvement of described a kind of reduction power consumption of terminal based on 802.11ah the improved method reducing field overhead, described step B includes:
B1, the STA that TWT agreement is set up in application with AP is not had to need and AP carries out Frame switch to determine the change of AP or to carry out time synchronized function synchronization with AP；
B2, the bit being used in FC (FrameControl, the frame control) field of control frame indicate the existence of next TWT field；
B3, next TWT field comprise control frame and receive the wakeup time value of target next time of STA, and therefore the presence or absence in control frame depends on whether this STA establishes TWT scheduling agreement with AP.
Below in conjunction with the drawings and the specific embodiments, it is described in further detail technical scheme.
Fig. 1 is the TWT schematic diagram of the present invention.In the communication system being made up of an access point AP and multiple work station STA, AP is responsible for planning as a whole the mode of operation of STA.AP is revived the moment to STA transmission by the TWTIE in Beacon frame, and STA revived from battery saving mode (resting state) in the agreement moment, enters full power state and is transmitted.STA can also transmit TWTIE to AP simultaneously, it was shown that self needs the time point revived, and AP can dynamically adjust the recovery time of distribution according to the feedback of STA.
Fig. 2 is the figure instruction of the TWTIE comprised in Beacon frame.
201: unit id field is the exclusive identifier of actual information unit.
202: length field represents the total bytes of this information unit information territory namely all fields thereafter.
203: control field instruction current power management mode.
204: request type field comprises the relevant information of TWT, including the type (request, suggestion, requirement, acceptance, refusal) indicating current TWT order, and indicate the current TWT pattern (dominant, recessive) dispatched.
205: target wakeup time field comprises request and sets up the wakeup time required by STA of TWT, if STA accepts AP assignment, this field is 0.
206: minimum length in time field represents that STA has expected the shortest time needed for Frame switch, namely STA needs the minimum length in time that keeps reviving.
The TWT that Fig. 3 is the present invention performs flow chart, comprises the following steps:
Step 301: access point AP fixed time broadcast Beacon frame, the TWTIE in Beacon frame comprises when the relevant information required when execution TWT for STA setting up TWT scheduling agreement with AP；
Step 302:STA revived in the scheduled time, monitored Beacon frame, obtained relevant information from TWTIE；
Step 303: the information according to obtaining determines TWT scheduling method: if next time, TWT wakeup time clearly provided in TWTIE, then current TWT scheduling method is dominant TWT, performs step 305；Otherwise, if TWTIE does not clearly provide TWT wakeup time next time, then it is recessive TWT, performs step 304；
Step 304:STA obtains TWT wakeup time next time by current TWT value being added with a fixed value；
Step 305: after clearly corresponding TWT pattern and next TWT wakeup time, STA enters resting state, waits scheduled wakeup time arrival to revive again and is transmitted.
Fig. 4 is wireless communication system network configuration diagram in the present invention, including BS (BaseStation, base station) or AP and multiple Wireless Telecom Equipment and a network hardware equipment, BS or AP is associated with the network hardware by LAN (LocalAreaNetwork, LAN).Usual network hardware equipment provides WAN (WideAreaNetwork, wide area network) to connect for communication system, it is possible to be router, switch, bridger, modem or system controller.Each BS or AP is had and is communicated by the equipment in antenna and region.Wireless network terminal can be the terminal unit that notebook computer, desktop computer, flat board, mobile phone etc. have radio function.
Fig. 5 is that in the present invention, terminal adds flow through a network figure, comprises the following steps:
Step 501: drive sweep, STA monitors the Beacon frame of AP broadcast, it is determined whether have the BSS that can add, it is thus achieved that the relevant information of BSS；
Step 502:STA and selected BSS carries out time synchronized；
Step 503:STA and AP sets up certification, authentication initialization process, authenticates including open system and shares key authentication；
Step 504:STA sends association request, initializes association process, registers the information of oneself in AP, and AP distributes associated identifiers AID to refer to this STA to STA after receiving.
It is above the preferably enforcement of the present invention has been illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the premise without prejudice to spirit of the present invention, and these equivalent deformation or replacement are all contained in the application claim limited range.
Claims (3)
1. reducing a communication means for cost reduction power consumption of terminal based on 802.11ah, it is characterized in that, step is as follows:
A, for access point AP (AccessPoint) set up target wakeup time TWT scheduling work station, allow AP to manage the recovery time at all working station STA (Station) in Basic Service Set BSS (BasicServiceSet), make different STA wake up in the different time periods and be transmitted；
B, for not setting up the STA of TWT scheduling with AP, be used in the frame control field of control frame bit to indicate the existence of next TWT field, in order to Tong Bu with AP time synchronized function and do not receive beacon.
2. the communication means reducing cost reduction power consumption of terminal based on 802.11ah as claimed in claim 1, is characterized in that, described step A includes:
A1, STA register relevant information by scanning, authentication, associated steps in AP, and AP is that STA distributes associated identifiers AID as identity；
A2, STA set up TWT agreement to AP application, are successfully established rear STA and are scheduling by TWT by AP；
A3, AP send beacon frame, and the information unit TWTIE (TWTInformationElement, TWT) in beacon frame comprises the wakeup time of one or more terminal；
In A4, first TWT scheduling, STA needs received beacon frame, determines that the current TWT form dispatched is dominant or recessive according to the TWTIE information carried；
A5, dominant TWT, TWT wakeup time is sent to STA by the Frame switch of AP next time；Recessive TWT, STA can calculate the wakeup time of next time by previously obtained TWT information.
3. the communication means reducing cost reduction power consumption of terminal based on 802.11ah as claimed in claim 1, is characterized in that, described step B includes:
B1, the STA that TWT agreement is set up in application with AP is not had to need and AP carries out Frame switch to determine the change of AP or to carry out time synchronized function synchronization with AP；
B2, the frame being used in control frame control a bit in FC (FrameControl) field to indicate the existence of next TWT field；
B3, next TWT field comprise control frame and receive the wakeup time value of target next time of STA, and therefore the presence or absence in control frame depends on whether this STA establishes TWT scheduling agreement with AP.
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| WO2018032954A1 (en) * | 2016-08-16 | 2018-02-22 | 华为技术有限公司 | Method and device for waking up wireless device |
| CN108377534A (en) * | 2016-10-12 | 2018-08-07 | 华为技术有限公司 | Awakening method, receiving device and sending ending equipment |
| CN108513339A (en) * | 2017-02-24 | 2018-09-07 | 珠海市魅族科技有限公司 | Communication means, communication device and the communication terminal of WLAN |
| CN108513341A (en) * | 2017-02-24 | 2018-09-07 | 珠海市魅族科技有限公司 | Communication means, communication device and the communication terminal of WLAN |
| WO2018171374A1 (en) * | 2017-03-23 | 2018-09-27 | 华为技术有限公司 | Instruction method and device for channel access |
| CN108668342A (en) * | 2017-03-28 | 2018-10-16 | 华为技术有限公司 | The method and apparatus of data transmission |
| CN109548121A (en) * | 2017-09-22 | 2019-03-29 | 珠海市魅族科技有限公司 | Communication means, device, access point apparatus and the site apparatus of WLAN |
| CN109803353A (en) * | 2017-11-16 | 2019-05-24 | 展讯通信（上海）有限公司 | A kind of data processing method, access point and work station |
| CN110662278A (en) * | 2018-06-29 | 2020-01-07 | 苹果公司 | Apparatus and method for mobile access point station |
| CN110784920A (en) * | 2019-09-17 | 2020-02-11 | 天津大学 | Time synchronization and multiple access fusion method between underwater gliders |
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| WO2024002060A1 (en) * | 2022-06-29 | 2024-01-04 | 华为技术有限公司 | Communication method and device, and computer-readable storage medium |
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|---|---|---|---|---|
| US10779235B2 (en) | 2016-08-16 | 2020-09-15 | Huawei Technologies Co., Ltd. | Method and apparatus for waking up wireless device |
| WO2018032954A1 (en) * | 2016-08-16 | 2018-02-22 | 华为技术有限公司 | Method and device for waking up wireless device |
| CN108377534A (en) * | 2016-10-12 | 2018-08-07 | 华为技术有限公司 | Awakening method, receiving device and sending ending equipment |
| CN108513339A (en) * | 2017-02-24 | 2018-09-07 | 珠海市魅族科技有限公司 | Communication means, communication device and the communication terminal of WLAN |
| CN108513341A (en) * | 2017-02-24 | 2018-09-07 | 珠海市魅族科技有限公司 | Communication means, communication device and the communication terminal of WLAN |
| CN108513339B (en) * | 2017-02-24 | 2022-06-21 | 珠海市魅族科技有限公司 | Communication method, communication device and communication terminal of wireless local area network |
| WO2018171374A1 (en) * | 2017-03-23 | 2018-09-27 | 华为技术有限公司 | Instruction method and device for channel access |
| US11917565B2 (en) | 2017-03-23 | 2024-02-27 | Huawei Technologies Co., Ltd. | Channel access indication method and device using first and second synchronization frames |
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| CN108668342A (en) * | 2017-03-28 | 2018-10-16 | 华为技术有限公司 | The method and apparatus of data transmission |
| CN108668342B (en) * | 2017-03-28 | 2020-06-26 | 华为技术有限公司 | Data transmission method and device |
| CN109548121B (en) * | 2017-09-22 | 2022-03-18 | 珠海市魅族科技有限公司 | Communication method and device of wireless local area network, access point equipment and site equipment |
| CN109548121A (en) * | 2017-09-22 | 2019-03-29 | 珠海市魅族科技有限公司 | Communication means, device, access point apparatus and the site apparatus of WLAN |
| CN109803353A (en) * | 2017-11-16 | 2019-05-24 | 展讯通信（上海）有限公司 | A kind of data processing method, access point and work station |
| CN110662278A (en) * | 2018-06-29 | 2020-01-07 | 苹果公司 | Apparatus and method for mobile access point station |
| CN110784920A (en) * | 2019-09-17 | 2020-02-11 | 天津大学 | Time synchronization and multiple access fusion method between underwater gliders |
| WO2022217612A1 (en) * | 2021-04-16 | 2022-10-20 | Oppo广东移动通信有限公司 | Wireless communication method and device |
| CN113938999A (en) * | 2021-10-29 | 2022-01-14 | 中国电子科技集团公司第五十四研究所 | Communication method, system, TWT user node and WiFi access point |
| CN113938999B (en) * | 2021-10-29 | 2024-08-23 | 中国电子科技集团公司第五十四研究所 | Communication method, system, TWT user node and WiFi access point |
| WO2024002060A1 (en) * | 2022-06-29 | 2024-01-04 | 华为技术有限公司 | Communication method and device, and computer-readable storage medium |
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