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Device for implementing dynamic time-slot TDMA distribution

A technology of dynamic time slot and time slot, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problems of low efficiency of coding system, inability to realize triple play, and WLAN can not be applied to the system of large-scale user access, etc.

Active Publication Date: 2008-10-29
杭州初灵信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing CMTS technology cannot be used normally on the network with large interference; to solve the problem that Moca, WLAN and other technologies cannot be applied to the system with large-scale user access
Solve the problem that the existing technology cannot realize the integration of three networks
Solve the problem of inefficiency of existing coding systems

Method used

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  • Device for implementing dynamic time-slot TDMA distribution
  • Device for implementing dynamic time-slot TDMA distribution
  • Device for implementing dynamic time-slot TDMA distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The project system consists of central office equipment, user equipment and jumpers. Central office equipment (Master) and user end equipment (Slave) are connected through cable TV amplifiers, distributors, splitters, and coaxial cables.

[0047] 1) Central office equipment:

[0048] One central office device can connect 64 user devices. The central office equipment modulates the Ethernet input digital signal into an OFDM analog signal, uses the TDMA (Time Division Multiple Access) protocol, and realizes one-to-many data communication through the coaxial cable, and transmits the data to the user equipment, and the user equipment will transmit data from the coaxial cable The transmitted OFDM signal is demodulated into a digital signal. If the data is for the user, the user equipment demodulates the data signal and restores it to the original data, and outputs it to the user's Ethernet for use by the user.

[0049] Similarly, the Ethernet data input by the user is modul...

Embodiment 2

[0057] The network management software adopts SNMP protocol and supports SNMP V1.0 / V2.0 / V3.0 protocol. Completed the design of the network management software for the integration of the three networks to realize early warning and control of network intrusion. Provide comprehensive network management functions for triple play. Its embedded SNMP is realized by modifying the source code of NET SNMP which is open source.

[0058] The network management software has the following functions:

[0059] 1) Flow statistics function: make statistics on the uplink and downlink traffic of each client;

[0060] 2) IGMP protocol realizes video multicast for time-shifted TV and video on demand;

[0061] 3) Limit the number of PCs connected to the client: limit the number of PCs connected to each client to protect the interests of operators;

[0062] 4) Broadcast packet and unknown packet suppression function: suppress broadcast packets or other attack packets to avoid the impact of these ...

Embodiment 3

[0069] 3. Preferred embodiment 3 (block diagram of the principles of central office equipment and client equipment)

[0070] like figure 2 Shown as 201 is the Ethernet signal; 202 is the RJ45 connection Ethernet signal; 203 is the PHY chip such as IP101, RTL8201 and other chips; 204 is the SOC chip to complete the main function; 205 is the SDRAM chip storage operation program; 206 is the FLASH chip storage Compression program; 207 is AD9865 or other high-speed AD / DA conversion chips, such as AD9868, AD9865 etc.; 208 is an OPA26 74 chip, which amplifies the output analog signal; 209 is a high-low pass filter to realize frequency division communication.

[0071] The working process of modulation: the Ethernet signal input by 201 is converted by 203 PHY chip, and the Ethernet signal on the twisted pair is converted into MII interface signal, and the network interface signal is converted into network data through the MII interface of 204 SOC chip, and the network The data is dir...

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Abstract

The invention relates to a realization device of time slot allocation TDMA, in particular to a realization device of the dynamic time slot allocation TDMA, aiming at solving the problem of low efficiency of the existing coding system. A dynamic time slot scheduling method is adopted in a TDMA communication system. The way of sending from primary ends to secondary ends is that the primary ends dispatch and broadcast the data to each secondary end according to the priority level and the length of data required by the secondary end equipment. The time slot scheduling of upstream data is that: the time of uploading time slot of the frame of the secondary ends is arranged by the primary ends in a unified way according to the priority level uploaded on the previous frame of the secondary ends and the length of the data to be uploaded. The secondary ends arrange proper data to be uploaded according to the size of time slot that the primary ends send to the secondary ends. The device of the invention can be widely applied to an EoC system, a wireless communication system and an optical fiber analog communication system.

Description

1. Technical field [0001] The patent of the present invention relates to a time slot allocation TDMA implementation device, especially a dynamic time slot allocation TDMA implementation device. 2. Background technology [0002] There are several existing technologies for high-speed broadband communication on coaxial cables: [0003] Cable Modem technology: CMTS systems based on DOCSIS1.1, DOCSIS2.0, and DOCSIS 3.0 standards are widely used in North America and Europe, but they are not acclimatized in my country. The reason is that most of the electrical equipment in our country has not passed the electromagnetic compatibility demonstration. Even if the products that have passed the electromagnetic compatibility certification are produced to "save costs", the electromagnetic radiation of the products will greatly exceed the standard. The cable TV coaxial cable network is a tree network. The noise will be concentrated (funnel effect), so that the noise will drown the normal c...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/56
Inventor 顾士平华晓勤
Owner 杭州初灵信息技术有限公司
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