CN104010345A

CN104010345A - Vehicle-mounted multi-mode LTE access and WLAN hotspot system device

Info

Publication number: CN104010345A
Application number: CN201410266260.3A
Authority: CN
Inventors: 黄海
Original assignee: Chongqing Huafeiyun Communication Technology Co Ltd
Current assignee: Chongqing Huafeiyun Communication Technology Co Ltd
Priority date: 2014-06-16
Filing date: 2014-06-16
Publication date: 2014-08-27

Abstract

The invention provides a vehicle-mounted multi-mode LTE access and WLAN hotspot system device. The device is composed of three function modules. The first module is a multi-mode LTE access module which is used for connecting a telecom operator 4G public network TDD-LTE signal with an FDD-LTE signal. The second module is a route adjustment and load balancing module and used for conducting two-way convergence and distribution and making a plurality of user handheld terminal data links in a vehicle respectively have access to the internet through the 4G public network signal of a plurality of operators. The third module is a WLAN hotspot and can provide network connection services at an open 2.4G public WiFi frequency band and an open 5.8G public WiFi frequency band at the same time. By means of the device, the purpose that in the operation process of an urban traffic system, real-time high-speed data communication for passengers in the vehicle to surf the internet is achieved.

Description

Vehicle multi-mode LTE access and WLAN hot point system equipment

Technical field

The invention belongs to Wireless Data Transmission field.Utilize now widely used WLAN(Wireless Local Area Networks WLAN (wireless local area network)) technology, and the 4th third-generation mobile communication technology LTE(Long Term Evolution, Long Term Evolution) carry out the service of mobile broadband data access, solve Traffic Systems in operation process, the real time high-speed data communication problem of passenger inside the vehicle's online.

Background technology

At present, in all kinds of traffic above-ground transportations, comprise public transport, subway, light rail, railway etc., passenger inside the vehicle grows with each passing day for the demand of broadband access network.Particularly be limited to Special Geographic and the electromagnetic environment of City Rail Transit System, the restriction of special wireless communication technique development level, also lacks a kind of use that is simple and easy at present, can realize the wireless communication devices of car-ground radio high-speed data communication.

Its main cause is: original GSM, and the wide area wireless communication network data transmission speed such as CDMA are limited; And the high speed WLAN communication means such as WLAN, after its terminal speed of related movement is per hour over 60 kilometers, due to factor impacts such as Doppler effect and the frequent switchings of channel, between actual car ground, data link bearing capacity sharply reduces, and cannot meet common overall trip speed is the real time high-speed transfer of data requirement of 60-160 kilometer city railway vehicle hourly.Existing only a few attempts adopting the vehicle-ground wireless communication system case based on WLAN technology, all occurs that the track train speed of a motor vehicle significantly reduces over 60 kilometers of active block transmittabilities afterwards per hour and even the situation of Transmission.Even if current state-of-the-art the 4th generation mobile communication technology LTE, although its network terminal also can complete high speed data transfer when high-speed mobile, but be limited to a LTE identical networking difficult problem, in same LTE signal coverage cell, total data link bearer is limited in one's ability, in urban track traffic transfer stop, the place that the rail vehicles such as rolling stock section are intensive, a plurality of terminals are shared its communication ability of getting off and are also had a greatly reduced quality, cannot meet the demand of the application such as real-time video transmission and multidigit passenger surf the Net simultaneously, therefore need to access the LTE signal of a plurality of frequency ranges of a plurality of operators simultaneously, extended network transmittability to greatest extent.

Summary of the invention

The present invention is directed to the characteristic of LTE and WLAN and defect separately, maximize favourable factors and minimize unfavourable ones, vehicle multi-mode LTE access and WLAN hot point system equipment have been designed, rationally utilize the wide area high-speed mobile terminal rapid data transmission ability of LTE, the local high bandwidth Large Volume Data communication capacity of WLAN, and dynamic routing adjustment and the load-balancing technique of onboard wireless communicating terminal, build the car ground high-speed radio transmission link of dynamic stability, thereby realize the two-way real time high-speed transfer of data between car ground, to meet the application such as passenger inside the vehicle's broadband wireless online..

Vehicle multi-mode LTE access and the transmission of WLAN hot point system equipment in urban track traffic are comprised of following two wireless modules.

one,tDD-LTE and the FDD-LTE network of access movement, telecommunications, Deng Duojia telecom operators of UNICOM, set up the public network of the 4G signal data connecting link that multichannel is stable to connection module, i.e. LTE terminal arrays.

two,in compartment, realize the WLAN wireless coverage of 2.4G and 5.8G frequency range, for the hand-held mobile WLAN equipment for surfing the net of passenger inside the vehicle (mobile phone, computer etc.), complete the WLAN focus module of WiMAX access, i.e. WLAN hotspot service.

In bus or urban railway transit train compartment, a plurality of passengers and hand-held WLAN radio networking device thereof are all in a narrow and small region of relatively concentrating, and all in low speed or relative static conditions.Therefore adopt WLAN to cover.WLAN is operated in 2.4G or the public open frequency range of 5.8G, and frequency spectrum resource is abundant; Approximately 300 meters of the effective coverage distances in Qi Dan community, are enough to covering whole city rail transit cars.In the situation that adopting intensive cell networking, huge bandwidth resources can be provided, and (every array carriage can provide the conventional broadband access resource of 4-6 54Mbps.If adopt the technical advantages such as 802.11 up-to-date n spatial multiplexings and MINO MIMO, can be single client the bandwidth up to 300-600Mbps is provided).On track vehicle, every array carriage is disposed a WLAN wireless access point AP, a plurality of wireless access point AP are by WLAN controller, access gigabit level is transmission network completely, meet the passenger in a urban track traffic 8-12 compartment simultaneously, access the transfer of data needs of vehicle multi-mode LTE access and WLAN hot point system simultaneously.

LTE be the 4th generation mobile communication technology, single base station cell signal can cover the visual range of 0.5-5 kilometer between existing station, its wide area coverage effect is being endeavoured to ensure in each large telecom operation commercial city, and its effective transmission speed is to moving velocity of terminal insensitive, be conducive to urban public transport, the RFDC access under the scenes such as urban track traffic.In LTEDan community, can provide maximum 60Mbps----up 20Mbps, descending 40Mbps bandwidth.But total amount of bandwidth is limited in Qi Dan community, also cannot as WLAN, by strengthening cell channel closeness, improve the effective bandwidth resource in unit space; Therefore in the situation that wireless Internet access user is intensive, there will be equally the situation of transfer resource anxiety.。

According to the actual conditions in city, there are movement, telecommunications and the multiple types of Deng Sanjia main flow telecom operators of UNICOM and the LTE network signal (public network signal) of frequency range in same place simultaneously.In order to improve the quality that public transport user is adopted to the basic applied business in WLAN when access, just need to access the 4G signal of a plurality of operators simultaneously.

In public transport compartment, completing WLAN signal covers, and after connecting the LTE connecting link of Duo Jia telecom operators, vehicle multi-mode LTE access and WLAN hot point system will adopt dynamic routing adjustment, the technology such as load balancing, complete with car in the WLAN communication of terminal, and by public network signal accessing Internet.

Vehicle multi-mode LTE access and WLAN hot point system equipment are mainly comprised of three parts.

First: the LTE terminal arrays of access when meeting 13 license frequencies of two kinds of 4G standards of the existing TDD-LTE of Chinese Ministry of Industry and Information and FDD-LTE, possesses 6 tunnel independence ether interfaces.(according to wireless signal honeycomb fashion, dispose principle, same place only has maximum 6 tunnels can supply the frequency of access at present in theory).

Second portion: dynamic routing adjustment and load balancing module.This part is mainly to play the effect of synthesized gateway, is relaying and the modular converter of LTE network and WLAN.The network of the hand-held mobile wlan device of a plurality of passengers in compartment can be connected, by dynamic routing, adjust and load balancing module, carry out two-wayly converging and distributing, respectively via the 4G public network signal accessing Internet of a plurality of operators.

Third part: WLAN hotspot service system, the bimodulus Wifi by 2.4G and 5.8G covers, and the network that completes the hand-held mobile wlan device of passenger in compartment connects.

Accompanying drawing explanation

Fig. 1 is vehicle multi-mode LTE access and WLAN hot point system building form and operation principle.

Claims

1. a vehicle multi-mode LTE accesses and WLAN hot point system equipment

This system equipment is that public LET network service and Che Nei wlan network hotspot service are carried out to UNICOM, maintains effective transmission link, and carrys out balanced traffic load by car-mounted terminal.

2. vehicle multi-mode LTE according to claim 1 accesses and WLAN hot point system, it is characterized in that accessing the public network LET of the telecom operators signal of loca simultaneously, and the WLAN hotspot service that 2.4G and 5.8G frequency range are provided.

3. wireless LTE access according to claim 3, comprises China Mobile, 3 TDD-LTE signals of China Telecom and CHINAUNICOM and FDD-LTE signal, and 13 effective frequencies are all accessible altogether, and possesses the wherein ability of 6 frequencies of access simultaneously.

4. WLAN hot point system according to claim 3 can provide the network connection service of the public WiFi frequency range of 2.4G and two openings of 5.8G simultaneously.

5. vehicle multi-mode LTE access according to claim 1 and WLAN hot point system equipment, possess dynamic routing adjustment and load balancing module.

6. module according to claim 5, is mainly the effect of playing synthesized gateway, is relaying and the modular converter of LTE network and WLAN.

7. functions of modules according to claim 6, its concrete effect is that the network of the hand-held mobile wlan device of a plurality of passengers in compartment is connected, by dynamic routing, adjust and load balancing module, carry out two-wayly converging and distributing, respectively via the 4G public network signal accessing Internet of a plurality of operators.