CN106412834A - Television white-spectrum wideband communication system based on WiFi chip, and communication method thereof - Google Patents
Television white-spectrum wideband communication system based on WiFi chip, and communication method thereof Download PDFInfo
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- CN106412834A CN106412834A CN201610913962.5A CN201610913962A CN106412834A CN 106412834 A CN106412834 A CN 106412834A CN 201610913962 A CN201610913962 A CN 201610913962A CN 106412834 A CN106412834 A CN 106412834A
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- data
- terminal
- base station
- communication system
- wifi chip
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
Abstract
The invention discloses a television white-spectrum wideband communication system based on a WiFi chip, and a communication method thereof. The system comprises a base station controller, an identify verification module, a position registration module, a broadcast registration module, an operation maintenance center, a charging module, a white-spectrum database and the like. The system and method have the following advantages: a suitable "cloud" can be provided by a core server set included in a communication network. Application of cloud calculation may be beneficial, because a controller may obtain calculation service, which is already beyond its own function. The application can be wide, and the price can be reasonably increased. An apparatus can also be provided in the cloud, for transmitting data between the controller and a core network.
Description
Technical field
The invention belongs to DTV and wireless communication technology field.A kind of specifically related to TV based on WiFi chip is white
Frequency spectrum wide-band communication system and its communication means.
Background technology
White frequency spectrum refers to vacant TV broadcast band, that is, between 470MHz and 790MHz, for avoiding between television broadcasting
The idle frequency range interfering.In order to more efficiently utilize the frequency spectrum resource of growing tension, the development space of white frequency spectrum will add
Greatly.Radio and television " white frequency spectrum " generally refer to three kinds of untapped radio and television frequency ranges：The frequency range not come into operation, transmitting station stop
The frequency range of sowing time and due to protective rate require and the frequency range of free time.Here, what we explain first is due to protection
Rate requires and the frequency range of free time, it is assumed that the preferable overlay area of the transmitting station is regular hexagon, is launched station when certain and determined one
During individual use channel, its 6 adjacent transmitting station can not use this channel, refers to Fig. 1.And do not affecting as main users
Broadcast television service receive in the case of, some lower powered " white frequency spectrum " wireless telecommunications systems can make as Secondary Users
Use this channel.But, the white frequency spectrum of TV application due to being affected by industrial chain, existing realization rate on cost also not
The purpose of commercialization can be reached.For this reason, how the white spectrum communication of TV is realized using existing chip just become very crucial.
Content of the invention
The invention aims to overcoming a kind of above-mentioned not enough offer white frequency spectrum broadband of TV based on WiFi chip to lead to
Letter system and its communication means.
A kind of white frequency spectrum wide-band communication system of the TV based on WiFi chip, including following part：Base station controller, is used for
Frame and a communication center in core network to base station offer pre-formatting；Authentication module, for awarding
During power customer access network, the identity of authorized user is verified；Location registration module, for registed authorization user and/or end
The position at end, thus complete terminal and the message route of base station；Broadcast registration module, for storing and processing with regard to broadcast data
Message；Operation maintenance center, for each functional entity in Operation and Maintenance communication system；Accounting module, for using to authorizing
Family and terminal provide the station message recording；White frequency spectrum data storehouse, for providing available white frequency spectrum data to authorized user.
The station message recording that described accounting module provides includes univalent charging and the charge on traffic of authorized user.
Described location registration module is additionally operable to store the concrete elaborate position of terminal, thus realizing when not interfering with
Carry out predetermined communication, prevent multiple neighbouring terminals from being communicated simultaneously.
Described broadcast registration module is additionally operable to receive the message that client sends thus updating working as of authorized user and terminal
Front state.
The concrete elaborate position of described storage terminal is used the offer of GPS oneself by terminal.
The concrete elaborate position of described storage terminal is positioned by using two different triangles.
According to the white frequency spectrum wide-band communication system of the described TV based on WiFi chip, wherein said base station controller controls
Communication means is：
Base station controller receives data to be sent by WiFi chip；
Format the data receiving according to predetermined frame format；
Selection wherein partly or entirely formats frame and is transferred to radio；
Radio sends frame with the speed being less than a frame per second；
Receive and be derived from wireless data；
Determine at least one response；
Described data transfer to high in the clouds is carried out cloud computing process；
Receive response data from high in the clouds；
According to predetermined frame format, response is formatted；
Radio is sent with the speed being less than a frame per second.
Described high in the clouds is public cloud, community cloud and/or private clound.
Advantages of the present invention has：Suitable " cloud " can be provided by the Core server set being included in communication network.
The use of cloud computing is probably beneficial, because it may obtain, to controller, the service of calculating has surmounted the function of itself.This
Allow to widely used at one and reasonable price enhancing.A device is may also provide, for data to control in cloud
Transmit between device processed and core network.However, the part or all of of some process is executed by cloud computing, sometimes introduce extra
, and often random delay.Therefore, the frame rate having sufficiently long gap between the message receiving and its response is so had to put
Slow another advantage is to controller, and it needs the flexibility using cloud computing.
Brief description
Fig. 1 is existing transmitting station channel allocation map
Fig. 2 is the structural representation of communication system of the present invention.
Fig. 3 is the schematic flow sheet sending data division in communication means of the present invention.
Fig. 4 is the schematic flow sheet of receiving data part in communication means of the present invention.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated：
A kind of white frequency spectrum wide-band communication system of the TV based on WiFi chip, including following part：Base station controller, is used for
Frame and a communication center in core network to base station offer pre-formatting；Authentication module, for awarding
During power customer access network, the identity of authorized user is verified；Location registration module, for registed authorization user and/or end
The position at end, thus complete terminal and the message route of base station；Broadcast registration module, for storing and processing with regard to broadcast data
Message；Operation maintenance center, for each functional entity in Operation and Maintenance communication system；Accounting module, for using to authorizing
Family and terminal provide the station message recording；White frequency spectrum data storehouse, for providing available white frequency spectrum data to authorized user.
The station message recording that described accounting module provides includes univalent charging and the charge on traffic of authorized user.
Described location registration module is additionally operable to store the concrete elaborate position of terminal, thus realizing when not interfering with
Carry out predetermined communication, prevent multiple neighbouring terminals from being communicated simultaneously.
Described broadcast registration module is additionally operable to receive the message that client sends thus updating working as of authorized user and terminal
Front state.
The concrete elaborate position of described storage terminal is used the offer of GPS oneself by terminal.
The concrete elaborate position of described storage terminal is positioned by using two different triangles.
According to the white frequency spectrum wide-band communication system of the described TV based on WiFi chip, wherein said base station controller controls
Communication means is：
Base station controller receives data to be sent by WiFi chip；
Format the data receiving according to predetermined frame format；
Selection wherein partly or entirely formats frame and is transferred to radio；
Radio sends frame with the speed being less than a frame per second；
Receive and be derived from wireless data；
Determine at least one response；
Described data transfer to high in the clouds is carried out cloud computing process；
Receive response data from high in the clouds；
According to predetermined frame format, response is formatted；
Radio is sent with the speed being less than a frame per second.
Described high in the clouds is public cloud, community cloud and/or private clound.
Core network is formed by service provider with based on the communication network of base station.Base station network is by one or more base stations
Composition, a base station is made up of base station controller and transmitter.Basic principle is to try to make intelligent network, therefore, base station
Transmitter is the simple equipment of pre-formatting.This framework leads to the minimum base station of cost, and provides flexibility for example to arrange
Transmission in multiple base stations is so that self-interference is minimized.When data is sent to an end application from client, just by
Pass to the service provider being responsible for terminal.Service provider add routing iinformation after, terminal service layer with regard to permissible
Know that data is activation services to that.Then data is passed to a terminal and is connected to base station network.Then this base station net
Network passes through downlink by data to associated base stations.Base station controller transfers data to terminal.Application program in terminal
Service layer can be served data to and be transferred to user side.Service layer increased the data in application program for the routing iinformation, this
Sample client can know the data which application program produces in terminal.Data and routing iinformation are then delivered to MAC
It is sent to base station with PHY.Any uplink data that base station receives is from terminal, and gives responsible being somebody's turn to do by base station network by hull
The service provider of terminal.When receiving the data from base station, Internet Service Provider checks the route letter being sent to user
The data of breath, the application program of application program and identity.Network provides each addressable address of terminal only one of which, according to send out
Send application program, it will not route data to different clients.It is assumed herein that having one between client and terminal
Map to one.Terminal signaling to base station passes through air interface transmission.Base station is through Backbone Transport information frame.Backbone network is
Internet or self-built network.Core network function resides in a network manager, and itself can be a void
Intend the cloud of entity.The information providing is sent to the frame of base station and coordinates frequency hopping distribution, management position record etc..Terminal sends
Frame, deliver in a sync database, this sync database is the interface between network and any user software system.Net
The information flow situation of network.This information flow shows by way of example, with reference to the network realizing weightless protocol machine communication.Display
One terminal, is an intelligent electric meter in this example, can be to the built-in module of machine communication by reading.Module is compiled
The reading of code, and by air interface to base station, it is sent to core network and is transmitted.Data is had to be stored in data high-speed
Caching and with described client IT system synchronization before it is possible to be processed.Data can similarly flow in another direction
Upper such that it is able to from client transmissions to terminal clientsaconnect data.The data of client be also stored in its stroke from
Core network, to the data caching of terminal, makes the number that the transmission time slot in the scheduling waiting from base station is buffered
According to.Using a layer in the data high-speed caching of highest level and the IT system of client, it is likely to specific to this client
The communication at end.This can be realized this client computer and delay to read and to write data to data high-speed by the method for management interface
Deposit.By doing so it is possible, client from terminal retrieval data and can write data to terminal.That layer below, in described terminal
Application layer can with data high-speed caching in application layer communication.This makes the specific coding of application program realize.Terminal with
Wirelessly, it carries out communication using MAC and PHY layer with base station.The frame level information that base station sends carries out data high-speed caching.
MiWIND is a kind of network service architectures of opening.A global network can be formed.Business can be with carry global
Network on, to be managed by user oneself.Can also carry on M2M service provider.M2M service provider can also build
Found the MiWIND honeycomb of oneself, zonal application and service is provided.
Base station controller is the unique point being communicated with base station, and base station is just by the terminal of news release to needs.Core
The function of the heart is assembling base station information frame to be sent.For this reason, base station controller needs predetermined decision-making.Base station controller also will be advised
Draw the related resource of radio, these include frequency planning, code division is joined, synchronization character is planned and load balance.In realization,
MiWIND employs different implementation methods.In general base station, contain the concept of controller here.Base station includes net
Network layers and key-course, the operation of the wireless device of control.Network and key-course are usually used software and realize.Radio is by one
The layer of individual embedded firmware, MAC layer and physical layer composition.Firmware receives the data from key-course, and the form of these data exists
It has been transformed to frame in MAC.MAC is the hardware being actually implemented as internal memory mapping.Sent by air interface in physical layer in MAC
Complete RF modulation before.One problem of existing structure is that embedded firmware is write using low level programming language, it is portable,
Test and debugging are relatively difficult.Another problem is that firmware is relative to particular machine, therefore, portable bad.One kind can
The solution of energy is exactly that frame is not to set up inside radio, and is placed in Internet.Then, frame is sent out by network
Deliver to MAC, so, before frame is sent, simply need to format a little just permissible.The advantage of this method is, mainly
It is the formatting carrying out data in software.One shortcoming is to receive the decode data, processes this data, and response, form
Delay can be caused, these delays may is that unacceptable in modern express network during change.Accordingly, it would be desirable to one
Flexible base station, he can process the delay producing due to software effectively.In actual realization, controller is a void
Plan machine, its feature is：Data form is turned to a series of frame, wherein each frame has the identical duration.Each frame
Duration can be at least one second, or 2 seconds.Between radio when transmission data, in receiving data
And send between response, at least transmit a frame.Can execute on PC.To be realized using .NET framework.Can be by from wireless
The data is activation that electricity receives is calculated to high in the clouds.The response of received data can be received from high in the clouds, and format
This response passes through network by wireless radio transmission.Controller includes an Internet and a key-course, and both is real with software
Existing.The data form that key-course will send turns to frame, and these frames subsequently can be by, for example, is connected to no by Ethernet
Line electricity.The embedded firmware that radio includes thin layer is used for MAC and physical layer for the data assuming formatting
By air interface transmission signal.Different from typical modem, its data and control have very different interface.One
Typical modem has the embedded firmware of much intelligence.Key-course will be moved on on these intelligent firmwares, then, programming
Just greatly simplify with debugging, because firmware can be realized using high-level programming language.The communication work(abstracting from physical layer
The easy tested can be more beneficial for.Finally, more will enter key-course by intelligent firmware, be more beneficial for software transplanting to not
Same physical equipment.Substantially, compare with traditional situation, its result is that simple physical equipment is used for by sky as base station
Middle interface sends and receives data.The work of base station to be managed by the software of key-course completely, and be easily transplanted to people and live
Machine on.Controller can selectively transmit some or all, and it is processed to cloud computing further from the data of wireless receiving.
Controller can utilize public cloud, community cloud, private clound or these any combination.Suitable " cloud " can be by being included in communication
The Core server set of network is providing.The use of cloud computing is probably beneficial, because it may obtain to controller calculating
Service has surmounted the function of itself.This allows to widely used at one and reasonable price enhancing.Also may be used in cloud
To provide a device, transmit between controller and core network for data.However, some process are executed by cloud computing
Part or all of, sometimes introduce extra, and often random delay.Therefore, so there is the message receiving and its respond it
Between have sufficiently long gap another advantage of slowing down of frame rate be to controller, it needs the flexibility using cloud computing.
Claims (8)
1. a kind of white frequency spectrum wide-band communication system of the TV based on WiFi chip is it is characterised in that include following part：Base station is controlled
Device processed, for providing the Frame of pre-formatting and a communication center in core network to base station；Authentication module,
For verifying to the identity of authorized user when authorized user accesses network；Location registration module, uses for registed authorization
Family and/or the position of terminal, thus complete terminal and the message route of base station；Broadcast registration module, closes for storing and processing
Message in broadcast data；Operation maintenance center, for each functional entity in Operation and Maintenance communication system；Accounting module, uses
In to authorized user and terminal offer station message recording；White frequency spectrum data storehouse, for providing available white spectrum number to authorized user
According to.
2. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to claim 1 is it is characterised in that described
The station message recording that accounting module provides includes univalent charging and the charge on traffic of authorized user.
3. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to claim 1 is it is characterised in that described
Location registration module is additionally operable to store the concrete elaborate position of terminal, thus realizing carrying out predetermined leading to when not interfering with
Letter, prevents multiple neighbouring terminals from being communicated simultaneously.
4. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to claim 1 is it is characterised in that described
Broadcast registration module is additionally operable to receive the message of client transmission thus updating the current state of authorized user and terminal.
5. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to claim 3 is it is characterised in that described
The concrete elaborate position of storage terminal is used the offer of GPS oneself by terminal.
6. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to claim 3 is it is characterised in that described
The concrete elaborate position of storage terminal is positioned by using two different triangles.
7. the white frequency spectrum wide-band communication system of the TV based on WiFi chip according to any one in claim 1-4, its
Described in base station controller control communication means be：
Base station controller receives data to be sent by WiFi chip；
Format the data receiving according to predetermined frame format；
Selection wherein partly or entirely formats frame and is transferred to radio；
Radio sends frame with the speed being less than a frame per second；
Receive and be derived from wireless data；
Determine at least one response；
Described data transfer to high in the clouds is carried out cloud computing process；
Receive response data from high in the clouds；
According to predetermined frame format, response is formatted；
Radio is sent with the speed being less than a frame per second.
8. communication means according to claim 7 is it is characterised in that described high in the clouds is public cloud, community cloud and/or privately owned
Cloud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610913962.5A CN106412834B (en) | 2016-10-20 | 2016-10-20 | Television white spectrum broadband communication system based on WiFi chip and communication method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610913962.5A CN106412834B (en) | 2016-10-20 | 2016-10-20 | Television white spectrum broadband communication system based on WiFi chip and communication method thereof |
Publications (2)
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| CN106412834A true CN106412834A (en) | 2017-02-15 |
| CN106412834B CN106412834B (en) | 2020-05-05 |
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| CN201610913962.5A Active CN106412834B (en) | 2016-10-20 | 2016-10-20 | Television white spectrum broadband communication system based on WiFi chip and communication method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877982A (en) * | 2017-03-29 | 2017-06-20 | 武汉米风通信技术有限公司 | A kind of broadcasting and TV frequency spectrum ultra-narrow band Internet of Things uplink frame sends system and method |
| CN106973102A (en) * | 2017-03-29 | 2017-07-21 | 武汉米风通信技术有限公司 | A kind of broadcasting and TV frequency spectrum ultra-narrow band Internet of Things downlink frame sends system and method |
| CN111525969A (en) * | 2020-04-28 | 2020-08-11 | 国家广播电视总局广播电视科学研究院 | Spectrum sensing method, terminal and system based on white spectrum database |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120077466A1 (en) * | 2010-09-24 | 2012-03-29 | O'mahony Barry A | Techniques to wirelessly transmit data |
| CN102412919A (en) * | 2010-09-21 | 2012-04-11 | 中兴通讯股份有限公司 | Method and system for multiple mobile network operators to share broadcast television white space |
| CN103081525A (en) * | 2010-06-22 | 2013-05-01 | 捷讯研究有限公司 | Methods and apparatus to access network connectivity information using predicted locations |
| CN103748937A (en) * | 2011-07-19 | 2014-04-23 | 高通股份有限公司 | Sleep mode for user equipment relays |
-
2016
- 2016-10-20 CN CN201610913962.5A patent/CN106412834B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103081525A (en) * | 2010-06-22 | 2013-05-01 | 捷讯研究有限公司 | Methods and apparatus to access network connectivity information using predicted locations |
| CN102412919A (en) * | 2010-09-21 | 2012-04-11 | 中兴通讯股份有限公司 | Method and system for multiple mobile network operators to share broadcast television white space |
| US20120077466A1 (en) * | 2010-09-24 | 2012-03-29 | O'mahony Barry A | Techniques to wirelessly transmit data |
| CN103748937A (en) * | 2011-07-19 | 2014-04-23 | 高通股份有限公司 | Sleep mode for user equipment relays |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877982A (en) * | 2017-03-29 | 2017-06-20 | 武汉米风通信技术有限公司 | A kind of broadcasting and TV frequency spectrum ultra-narrow band Internet of Things uplink frame sends system and method |
| CN106973102A (en) * | 2017-03-29 | 2017-07-21 | 武汉米风通信技术有限公司 | A kind of broadcasting and TV frequency spectrum ultra-narrow band Internet of Things downlink frame sends system and method |
| CN111525969A (en) * | 2020-04-28 | 2020-08-11 | 国家广播电视总局广播电视科学研究院 | Spectrum sensing method, terminal and system based on white spectrum database |
| CN111525969B (en) * | 2020-04-28 | 2022-04-19 | 国家广播电视总局广播电视科学研究院 | Spectrum sensing method, terminal and system based on white spectrum database |
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| CN106412834B (en) | 2020-05-05 |
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Effective date of registration: 20200402 Address after: No. 368, Keyun Road, hi tech Zone, Chengdu, Sichuan 610000 Applicant after: Chengdu Mifeng perception Technology Co., Ltd Address before: 610000 Sichuan city of Chengdu province Chengdu Tianfu Avenue in the middle of the 666 No. 2 Building 8 floor No. 802 Applicant before: CHENGDU MIWIND COMMUNICATION TECHNOLOGY Co.,Ltd. |
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