CN106412834B

CN106412834B - Television white spectrum broadband communication system based on WiFi chip and communication method thereof

Info

Publication number: CN106412834B
Application number: CN201610913962.5A
Authority: CN
Inventors: 余少波; 张德鑫; 徐镜媛
Original assignee: Chengdu Mifeng Perception Technology Co Ltd
Current assignee: Chengdu Mifeng perception Technology Co., Ltd
Priority date: 2016-10-20
Filing date: 2016-10-20
Publication date: 2020-05-05
Anticipated expiration: 2036-10-20
Also published as: CN106412834A

Abstract

The invention discloses a television white-spectrum broadband communication system based on a WiFi chip and a communication method thereof. The system comprises a base station controller, an identity 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 invention has the advantages that: a suitable "cloud" may be provided by a collection of core servers contained in a communications network. Using cloud computing may be beneficial because it may have exceeded its own functionality to obtain computing services for the controller. This allows for a widespread and cost effective enhancement. A means may also be provided in the cloud for data transfer between the controller and the core network.

Description

Television white spectrum broadband communication system based on WiFi chip and communication method thereof

Technical Field

The invention belongs to the technical field of digital televisions and wireless communication. In particular to a television white spectrum broadband communication system based on a WiFi chip and a communication method thereof.

Background

White spectrum refers to the idle TV broadcasting frequency band, i.e. the idle frequency band between 470MHz and 790MHz, in order to avoid mutual interference between TV broadcasts. In order to more effectively utilize the increasingly tense spectrum resources, the development space of white spectrum will be enlarged. Broadcast television "white spectrum" generally refers to three unused broadcast television bands: unused frequency bands, frequency bands when the transmitting station stops broadcasting, and frequency bands which are free due to the requirement of protection rate. Here, we first explain what is the frequency band that is free due to the requirement of the protection rate, and assume that the ideal coverage area of the transmitting stations is a regular hexagon, and when a certain transmitting station determines a used frequency channel, its neighboring 6 transmitting stations cannot use the frequency channel, see fig. 1 for details. Some low power "white spectrum" wireless communication devices can use this channel as a secondary user without affecting the reception of broadcast television services as a primary user. However, the application of the white spectrum of the television is influenced by the industry chain, and the conventional implementation means cannot achieve the commercial purpose in terms of cost. For this reason, how to implement tv white spectrum communication using the existing chip becomes very critical.

Disclosure of Invention

The invention aims to overcome the defects and provides a television white spectrum broadband communication system based on a WiFi chip and a communication method thereof.

A television white spectrum broadband communication system based on a WiFi chip comprises the following parts: a base station controller for providing preformatted data frames and a point of contact into a core network to a base station; the identity authentication module is used for authenticating the identity of the authorized user when the authorized user accesses the network; the position registration module is used for registering the positions of the authorized users and/or the terminals so as to complete the message routing of the terminals and the base station; a broadcast registration module for storing and processing messages related to broadcast data; the operation maintenance center is used for operating and maintaining each functional entity in the communication system; the charging module is used for providing charging records for authorized users and terminals; a white spectrum database for providing white spectrum data available to authorized users.

The charging record provided by the charging module comprises unit price charging and flow charging of the authorized user.

The position registration module is also used for storing the specific accurate position of the terminal, thereby realizing the scheduled communication when no interference exists and preventing a plurality of nearby terminals from communicating at the same time.

The broadcast registration module is also used for receiving the message sent by the client so as to update the current states of the authorized user and the terminal.

The specific precise position of the storage terminal is provided by the terminal using a GPS.

The specific precise location of the storage terminal is located by using two different triangles.

According to the television white spectrum broadband communication system based on the WiFi chip, the communication method controlled by the base station controller is as follows:

the base station controller receives data to be transmitted through a WiFi chip;

formatting the received data according to a predetermined frame format;

selecting some or all of the formatted frames for transmission to the radio;

the radio transmits frames at a rate of no more than one frame per second;

receiving data from a radio;

determining at least one response;

transmitting the data to a cloud end for cloud computing processing;

receiving response data from the cloud;

formatting the response according to a predetermined frame format;

the radio transmits at a rate of no more than one frame per second.

The cloud is a public cloud, a community cloud and/or a private cloud.

The invention has the advantages that: a suitable "cloud" may be provided by a collection of core servers contained in a communications network. Using cloud computing may be beneficial because it may have exceeded its own functionality to obtain computing services for the controller. This allows for a widespread and cost effective enhancement. A means may also be provided in the cloud for data transfer between the controller and the core network. However, performing some or all of some processing through cloud computing sometimes introduces additional, and often random, delays. Thus, another advantage of such a slowing down of the frame rate with a sufficiently long gap between the received message and its response is that it requires flexibility to take advantage of cloud computing to the controller.

Drawings

FIG. 1 is a diagram of a conventional channel allocation for a transmitting station

Fig. 2 is a schematic structural diagram of a communication system according to the present invention.

Fig. 3 is a flow chart of a data transmission part in the communication method of the present invention.

Fig. 4 is a flow chart illustrating a portion of the received data in the communication method of the present invention.

Detailed Description

The invention is further illustrated by the following specific examples:

formatting the received data according to a predetermined frame format;

selecting some or all of the formatted frames for transmission to the radio;

the radio transmits frames at a rate of no more than one frame per second;

receiving data from a radio;

determining at least one response;

transmitting the data to a cloud end for cloud computing processing;

receiving response data from the cloud;

formatting the response according to a predetermined frame format;

the radio transmits at a rate of no more than one frame per second.

The cloud is a public cloud, a community cloud and/or a private cloud.

The core network consists of a service provider and a base station based communication network. The base station network consists of one or more base stations, one of which consists of a base station controller and a transmitter. The basic principle is to try to make the network intelligent, so the base station transmitter is a simple device that is pre-formatted. This architecture results in the lowest cost base station and provides flexibility such as scheduling transmissions at multiple base stations so that self-interference is minimized. When data is transmitted from the client to a terminal application, it is passed to the service provider responsible for managing the terminal. After the service provider adds the routing information, it is known at the service layer of the terminal to which service the data is sent. The data is then delivered to a terminal connected to the base station network. The base station network then sends the data to the relevant base station via the downlink. The base station controller transmits the data to the terminal. The application on the terminal may also provide data to the service layer for transmission to the user side. The service layer adds routing information to the data in the application program so that the client can know which application programs generate data in the terminal. The data and routing information is then passed to the MAC and PHY for transmission to the base station. Any uplink data received by the base station is transmitted from the terminal and through the base station network to the service provider responsible for the terminal. Upon receiving the data from the base station, the network service provider checks the routing information, application and identity data of the application sent to the user. The network provides that each terminal has only one addressable address, and it does not route data to different clients depending on the sending application. It is assumed here that there is a one-to-one mapping between the client and the terminal. The terminal signals to the base station are transmitted over the air interface. The base station transmits the information frame through the backbone network. The backbone network is an Internet network or a self-built network. The core network functions reside in a network manager, which itself may be a cloud of virtual entities. The information provided is sent to the base station's frame and coordinates the frequency hopping assignment, manages location records, etc. The frames sent by the terminal are sent to a synchronization database, which is the interface between the network and any user software system. Information flow situation of the network. The information flow refers to a network implementing a weightless protocol engine communication, by way of example. A terminal, in this example a smart meter, is shown, which is able to communicate to the machine by reading a built-in module. The module encodes the reading and transmits it over the air interface to the base station, which transmits it to the core network. Data may be processed before being stored in a data cache and synchronized with the client IT system. Data can likewise flow in the other direction so that data can be transferred from the client to the end client. The client's data will also be stored in its data cache from the core network to the terminal on its way, with the data being buffered while waiting for the scheduled transmission slot from the base station. A layer is used in the highest level data cache and the client's IT system, which is likely to be client-specific communication. This may be accomplished by managing the way the interface is implemented to read and write data to the data cache. By doing so, the client can retrieve data from and write data to the terminal. The application layer at the terminal may communicate with the application layer in the data cache, as follows. This enables application specific coding. The terminal communicates with the radio, which uses the MAC and PHY layers to communicate with the base station. And carrying out data caching on the frame-level information sent by the base station. MiWIND is an open web services architecture. A global network can be formed. The service can be mounted on a global network and managed by the user himself. Or may be mounted on the M2M service provider. The M2M service provider may also establish its own MiWIND cell, providing regional applications and services.

The base station controller is the only point of communication with the base station that distributes the message to the desired terminals. The function of the core is to assemble frames of information to be transmitted by the base station. For this purpose, the base station controller needs a predetermined decision. The base station controller also plans radio-related resources including frequency planning, code allocation, sync word planning, and load balancing. In implementation, MiWIND adopts different implementation methods. The general base station includes the concept of the controller. The base station includes a network layer and a control layer that control the operation of the radio equipment. The network and control layers are typically implemented using software. The radio is composed of a layer of embedded firmware, MAC layer and physical layer. The firmware receives data from the control layer, the format of which has been converted to frames in the MAC. The MAC is hardware that is actually implemented as a memory map. RF modulation is done before the MAC is sent over the air interface at the physical layer. One problem with existing architectures is that embedded firmware is written in a low-level programming language, which is difficult to carry, test and debug. Another problem is that the firmware is machine specific and therefore not very portable. One possible solution is that the frames are not built inside the radio, but are placed on the network layer. The frame is then sent over the network to the MAC, so that little formatting is required before the frame can be sent. The advantage of this approach is that the formatting of the data is primarily done in software. One disadvantage is that delays are incurred in receiving and decoding data, processing the data, and responding, formatting, which may not be acceptable in modern high-speed networks. Therefore, there is a need for a flexible base station that can efficiently handle the delays due to software. In practical implementation, the controller is a virtual machine, and is characterized in that: the data is formatted as a series of frames, where each frame has the same duration. The duration of each frame may be at least one second, or 2 seconds. At least one frame is transmitted between receiving data and transmitting a response when transmitting data with the radio. May be executed on a PC. NET framework is adopted for implementation. Data received from the radio may be sent to the cloud for computation. A response to the received data may be received from the cloud and formatted for radio transmission over the network. The controller includes a network layer and a control layer, both of which are implemented in software. The control layer formats the data to be transmitted into frames, which may then be connected to the radio via, for example, ethernet. The radio includes a thin layer of embedded firmware for presenting the formatted data to the MAC and a physical layer for transmitting signals over the air interface. Unlike a typical modem, its data and control have very different interfaces. A typical modem has a lot of intelligent embedded firmware. Moving the firmware of these intelligence up to the control layer, then programming and debugging is greatly simplified, since the firmware can be implemented using a high-level programming language. The communication function abstracted from the physical layer is more beneficial to the simplification of the test. And finally, more intelligent firmware enters the control layer, so that software can be more favorably transplanted to different physical devices. In essence, the result is a simple physical device that acts as a base station for transmitting and receiving data over the air interface, as compared to the conventional case. The operation of the base station is managed entirely by the software of the control layer and is easily portable to human and living machines. The controller may selectively pass some or all of the data it receives from the wireless to cloud computing for further processing. The controller may utilize a public cloud, a community cloud, a private cloud, or any combination of these. A suitable "cloud" may be provided by a collection of core servers contained in a communications network. Using cloud computing may be beneficial because it may have exceeded its own functionality to obtain computing services for the controller. This allows for a widespread and cost effective enhancement. A means may also be provided in the cloud for data transfer between the controller and the core network. However, performing some or all of some processing through cloud computing sometimes introduces additional, and often random, delays. Thus, another advantage of such a slowing down of the frame rate with a sufficiently long gap between the received message and its response is that it requires flexibility to take advantage of cloud computing to the controller.

Claims

1. A communication method of a television white spectrum broadband communication system based on a WiFi chip is characterized in that the communication system comprises the following parts: a base station controller for providing preformatted data frames and a point of contact into a core network to a base station; the identity authentication module is used for authenticating the identity of the authorized user when the authorized user accesses the network; the position registration module is used for registering the positions of the authorized users and/or the terminals so as to complete the message routing of the terminals and the base station; a broadcast registration module for storing and processing messages related to broadcast data; the operation maintenance center is used for operating and maintaining each functional entity in the communication system; the charging module is used for providing charging records for authorized users and terminals; a white spectrum database for providing available white spectrum data to authorized users; the charging record provided by the charging module comprises unit price charging and flow charging of an authorized user; the position registration module is also used for storing the specific accurate position of the terminal, thereby realizing the preset communication when no interference exists and preventing a plurality of nearby terminals from communicating at the same time; the broadcast registration module is also used for receiving a message sent by the client so as to update the current states of the authorized user and the terminal; the specific accurate position of the storage terminal is provided by a GPS of the terminal; the specific accurate position of the storage terminal is positioned by using two different triangles; the control communication method of the base station controller comprises the following steps:

formatting the received data according to a predetermined frame format;

selecting some or all of the formatted frames for transmission to the radio;

the radio transmits frames at a rate of no more than one frame per second;

receiving data from a radio;

determining at least one response;

transmitting the data to a cloud end for cloud computing processing;

receiving response data from the cloud;

formatting the response according to a predetermined frame format; the cloud is a public cloud, a community cloud or a private cloud; the controller includes a network layer and a control layer that formats the data to be transmitted as a series of frames, wherein each frame has the same duration, wherein each frame has a duration of 1 second, and wherein at least one frame is transmitted between receiving the data and transmitting a response when transmitting the data to the radio.