Broadband wireless access method, broadband wireless access system and central control system

A central control system, broadband wireless technology, applied in the field of mobile communication, can solve problems such as high construction cost and energy waste, and achieve the effect of reducing network deployment cost and improving user experience

Active Publication Date: 2012-11-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a broadband wireless access solution to at least solve the problems of spectrum resources, energy waste and high construction costs caused by the wireless network coverage of high-speed railways using cellular technology in the above-mentioned related technologies

Method used

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  • Broadband wireless access method, broadband wireless access system and central control system
  • Broadband wireless access method, broadband wireless access system and central control system
  • Broadband wireless access method, broadband wireless access system and central control system

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Embodiment 1

[0047] This embodiment provides an improved LTE network architecture based on RoF technology, which can provide wireless access for high-speed moving objects (for example, high-speed trains), and also provides a cell handover mechanism under this architecture, so as to Improve system throughput and reduce handover call drop rate.

[0048] Figure 4 It is a schematic diagram of a broadband wireless access network architecture of a RoF-based high-speed railway according to Embodiment 1 of the present invention, as shown in Figure 4 As shown, the relay node (Relay Node, RN for short) in the existing LTE system architecture is placed on the high-speed train, and the wireless transmission between the ground and the train is realized by using the eNodeB to Relay Node (eNB-RN) air interface. Among them, the RN has two functions: one is that the RN acts as a relay between the eNB and the user, and establishes a wireless link between the LTE user in the carriage and the eNB beside th...

Embodiment 2

[0054] Since the trajectory of the high-speed trains running on the high-speed railway is usually fixed, its running time and direction are also predictable, and the distance between the trains is large, so this embodiment provides an improved LTE network architecture based on the RoF technology. A method for accessing a communication network of a wireless AP in a high-speed train.

[0055] Such as Figure 4 As shown, in the process of the embodiment, the relay node (Relay Node, RN for short) in the LTE system architecture can be placed on the high-speed train, and the wireless transmission between the ground and the train can be realized by using the eNB-RN air interface. For example, the RN can establish a wireless link between the LTE users in the car (that is, wireless APs in multiple modes) and the eNB beside the track through various communication modes supported in the car. On the basis of this access method, the LTE cell next to the track uses a CCS to connect and con...

Embodiment 3

[0060] In actual situations, the speed of high-speed trains is changing at any time, and it is impossible to accurately judge the time when the train enters the next RRU. Therefore, the simultaneous operation mode of two cells can be adopted, that is, RRU1 and RRU2 are turned on at the same time, and jointly form an RRU that moves together with the train. light chasing area. CCS can confirm the location and direction of the train by periodically sending beacon signals and receiving ACK signals from on-board RNs forwarded by different RRUs. That is, as the train moves, the CCS can only turn on the RRU closest to the train through the optical switch, and put the other RRUs in a sleep state, so that all the available spectrum resources of the cell can move with the train movement, without spectrum The waste of resources also reduces the consumption of electric energy and realizes green communication.

[0061] Such as Figure 5 As shown, the train runs from RRU1 to RRU2, RRU1 is...

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Abstract

The invention discloses a broadband wireless access method, a broadband wireless access system and a central control system. The method includes the steps that the CCS (central control system) periodically transmits signaling signals to a relay node arranged on a high-speed moving object by the aid of an RRU (remote radio unit) and receives acknowledgement messages of the signaling signals from the relay node; and the CCS determines state information of the high-speed moving object according to the received acknowledgement messages, enables a target RRU corresponding to the state information to be on by the aid of an optical switch and enables the source RRU corresponding to the state information to be off, wherein the state information includes the current position and the current driving direction. By the aid of the broadband wireless access method and the broadband wireless access system, control, operation and maintenance processes of the system are simplified, frequency spectrum resources are reduced, energy waste is lowered, and user experience is improved.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a broadband wireless access method and system, and a central control system. Background technique [0002] With the rapid development of my country's high-speed railways, providing reliable, real-time, and efficient broadband wireless network access services for high-speed train passengers has become a hot spot in mobile broadband communication research at home and abroad. At present, there are three main schemes for wireless network coverage of high-speed railways: satellite communication scheme, leaky cable scheme and cellular technology scheme. [0003] The satellite communication solution refers to the direct connection between the high-speed train and the ground through a satellite network. In areas where satellite signals cannot be covered, such as tunnels and stations, it is switched to the ground cellular network, and the interior of the train is covered by a Wi-Fi net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/16H04W36/08
CPCY02D30/70
Inventor 章嘉懿王海波张学林江海秦洪峰李萍魏继东许月圆项飞
Owner ZTE CORP
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