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Multi-cell cooperation rapid handoff switching method based on switching invitation

A multi-cell cooperation and handover technology, applied in the field of information transmission, can solve the problems of handover invitation, response information failure, affecting the reliability of handover and handover delay, etc., to shorten the execution time, save the transmission carrier and power Resources, the effect of expanding the scope

Inactive Publication Date: 2016-01-13
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0013] Although the data transmission channel on the physical layer is carefully designed, it is inevitable that due to data transmission errors, timeouts, etc., the handover invitation, the transmission of response information, and the signaling control may fail. Therefore, how to quickly recover the signal link from the failure Communication interruption is particularly important, which directly affects the reliability and delay of handover

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  • Multi-cell cooperation rapid handoff switching method based on switching invitation
  • Multi-cell cooperation rapid handoff switching method based on switching invitation
  • Multi-cell cooperation rapid handoff switching method based on switching invitation

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Embodiment Construction

[0049] Below in conjunction with the accompanying drawings, specific embodiments of the present invention are given to further illustrate the present invention.

[0050] Assuming that the wireless mobile communication scene between the on-board information unit OBU and the roadside unit RSU when the bus is driving straight is as follows: figure 1 As shown, the roadside unit RSU is an LTE cell base station eNB, and the antenna height of the base station is h b =150m, the working frequency f=2100MHz, and the transmitting power is 20W. The eNBs of each cell are connected through the X2 interface to form a Mesh network, forming an information sharing channel between each cell of the cell cluster, and the distance between eNBs is 3km. And each cell eNB is connected to the mobile management entity / gateway (MME / S-GW) of the LTE network control center through the S1 interface. In order to simplify the graphic structure, figure 1 Only three cell base stations are given in (b 1 ,b 2...

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Abstract

The invention discloses a multi-cell cooperation rapid handoff switching method based on switching invitation, and the method sends switching invitation and switching state information sharing mechanism to a mobile terminal in a quasi-periodic manner through multi-cell cooperation, irons out the defects of a conventional backward handoff switching method, and enables the handoff switching of the mobile terminal to be more rapid, efficient and reliable. The method also employs a sliding window ordered transmission mechanism in a variable size, effectively avoiding pingpong switching, and can achieve seamless switching. Meanwhile, the method can provide a cooperative diversity gain for the mobile terminal at a cell edge, can overcome mutual interference among cells, and reduces the possibility of communication interruption caused by the building failure of a new link in switching. The method can be widely used in a wireless communication environment where a mobile line is more ordered, is relatively fixed and is higher in moving speed, such as an urban BRT line, a motorway, and a high-speed railway.

Description

technical field [0001] The invention relates to the technical field of collaborative wireless mobile communication and intelligent transportation, and in particular to the information transmission technology between a vehicle-mounted mobile terminal and various wireless network access points around roads when a bus is running. Background technique [0002] Multi-cell cooperation is also called multi-base station cooperation, coordinated multi-point (CoMP), network MIMO, and the like. The basic principle of multi-cell cooperation technology is to eliminate the interference of cell edge users and improve the data rate of edge users through the mutual cooperation between cell base stations and the use of base station scheduling or joint processing. In the process of multi-cell cooperation, information exchange must be carried out between cell base stations, so certain cooperation overhead will be generated. If the design is not handled properly, the cooperation overhead may wea...

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Application Information

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IPC IPC(8): H04W36/18H04W36/00H04L5/00
CPCH04L5/0035H04W36/0011H04W36/18
Inventor 康桂华康鸿博
Owner HOHAI UNIV CHANGZHOU
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