In this paper, we proposed to integrate WLAN technology with DTV over EPON system to provide wireless service to the DTV set-top-box(STB) for end user. First of all, the whole wireless DTV over EPON system architecture is introduced. There are mainly three parts: the accessing part, EPON system and the wireless receiving part. The working mechanism of each part is also described. Then, the paper focus on the design and implementation of the receiving device: wireless STB. The key point of the design is to integrate WLAN chipset into a normal DTV STB to enable wireless transmission. Hardware design is discussed in detail and software design is also mentioned in the last part of the article. Finally, conclusions are drawn out: WLAN signal could satisfy the transmission bandwidth requirement of DTV over EPON system. The proposed system can work properly.
Current broadband access system such as ADSL can not satisfy the network applications as the development of network
services. In this paper, we proposed to use WLAN technology on the HFC network as a terminal broadband access plan.
First of all, theoretical analysis is given to support the feasibility of using WLAN technology on the HFC network. Then,
transmission experiments and results of the proposed plan are described in this paper. The key point of the plan is to use
a WLAN access point device as a modem to modulate the baseband Ethernet signal into 2.4GHz WLAN signal which
then be transmitted via coaxial cable(COAX). The experimental results show that the average traffic throughput of the
system could reach to approximate 20Mbps which is the theoretical throughput of 802.11g WLAN transmission. And the
transmission throughput has no remarkable change no matter there is CATV signal in the system or not. Finally,
conclusions are drawn out: The proposed system can work properly. WLAN signal is quite suitable to be transmitted in
the coaxial cable. CATV signal and WLAN signal are not interfering with each other in the system. Using WLAN on the
existing coaxial cable which has already accessed to thousands of people's home could be a cost-effective plan for
broadband access on the HFC network.
In this paper, a system of digital television over EPON is first introduced. System structure and working process are
described in detail, including technology scheme of each part. According to DVB-C, digital TV signal is first received,
then TS streams are de-multiplexed and decrypted and so IP stream made up of TS streams is transmitted in EPON.
Then, as the most important terminal device on the side of users, STB receives Ethernet data, gets the MPEG-2 TS
through network processing. After that, STB parses TS file, decodes video and audio, analyzes SI data, and sends the
gained data to TV to display video and EPG. Besides, STB fulfills the web browser. According to the function of the
system, technical requirements and main scheme of an IPTV STB are analyzed and realized. It's based on AMD Au1200
processor with Linux operation system. The hardware and software architectures are introduced, together with functional
description of every part. We realize all modules required and the experiment shows a good performance of facility and