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Handover method based on carrier aggregation in high-speed mobile environment

A high-speed mobile, carrier aggregation technology, applied in electrical components, wireless communication, etc., can solve the problem of user communication quality degradation, and achieve the effect of improving communication performance, enhancing reception quality, and ensuring communication quality

Active Publication Date: 2011-12-28
BEIJING JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

In order to solve a series of handover problems in the public network communication under the high-speed railway environment, due to the rapid movement of the train, the users on the train will quickly pass through the handover area, causing the quality of user communication to decline

Method used

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  • Handover method based on carrier aggregation in high-speed mobile environment
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  • Handover method based on carrier aggregation in high-speed mobile environment

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Embodiment Construction

[0029] Currently, the uplink and downlink peak rates supported by the LTE-A definition are 500Mbit / s and 1Gbit / s respectively. The potential deployment spectrum of LTE-A includes: 450-470MHz, 698-862MHz, 790-862MHz, 2.3-2.4GHz, 3.4 -4.2GHz, 4.2-4.99GHz, etc., the new frequency bands show a trend of discretization and differentiation. The system bandwidth is 20-100MHz. Considering the existing spectrum allocation method and planning, it is difficult to find a wide enough continuous spectrum to bear the 100MHz bandwidth requirement of LTE-A. Therefore, 3GPP proposes to use carrier aggregation technology to solve LTE-A's demand for frequency band resources. The frequency band aggregation technology rationally multiplexes multiple frequency bands, enabling LTE-A users to simultaneously receive data with a bandwidth exceeding 20MHz. In high-speed mobile scenarios, the system needs to aggregate at least two carriers. The source eNB and the target eNB use different component carrie...

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Abstract

The invention relates to a switching method based on carrier wave aggregation in a high speed mobile environment. The method comprises the following steps: (1) source cell base station source eNB sends each CC signal quality detection command of an object cell to A_UE or RN, and A_UE or RN sends detected cell each CC signal quality to the source eNB; (2) the source eNB sends a detection command of detecting present cell signal quality to UE to be switched, a switching standard employs an RSRQ determination criterion, UE calculates an RSRQ value of the cell signal quality, and when the value is smaller than a switching threshold, UE sends the RSRQ value to the source eNB. The invention provides a method of detecting CC signal quality with auxiliary of other equipment, so that when in high speed movement on a railway, a user of a high speed railway can carry out user switching rapidly.

Description

technical field [0001] The invention relates to a handover method of mobile terminal equipment, in particular to a handover method based on carrier aggregation in a high-speed mobile environment. Background technique [0002] From Beijing-Tianjin Intercity Railway, Wuhan-Guangzhou High-speed Railway to Beijing-Shanghai High-speed Railway, from 200km / h to 500km / h, the maximum speed of railways has been refreshed again and again. While new types of trains and increased speeds bring a comfortable and efficient ride environment, they also put forward more stringent requirements for railway private network communications and public network 2G / 3G communications. [0003] Since the main target customers of high-speed railways are business trips or tourist trips, users need to use various mobile communication services on high-speed railways. These services include not only voice services and video services, but also high-speed data uplink and downlink services. The LTE (Long Term ...

Claims

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Application Information

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IPC IPC(8): H04W36/30H04W74/08
Inventor 赵超徐少毅黄清谈振辉
Owner BEIJING JIAOTONG UNIV
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