A Spectrum Handover Method and Device Based on Cognitive Radio System

A cognitive radio and spectrum switching technology, applied in the field of spectrum switching based on cognitive radio system, can solve the problems of high random access failure probability and random access delay, affecting user experience of CR system, high service interruption time, etc. Achieve the effect of avoiding random access conflicts, reducing the probability of spectrum handover failure and service interruption time, and improving user experience

Active Publication Date: 2017-06-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] During the spectrum switching process of the CR system, it is necessary to switch all RRC (Radio Resource Control, radio resource control) terminal devices in the entire cell to the target operating frequency point, and there are many terminal devices in the RRC connection state (it can be more than 1200 ), so the use of the existing spectrum switching method will cause a large number of terminal devices to concentrate on performing the random access process on the target operating frequency in a short period of time, resulting in a high random access failure probability and random access delay, thus This results in a higher frequency spectrum switching failure probability and a higher service interruption time, which affects the user experience of the CR system

Method used

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  • A Spectrum Handover Method and Device Based on Cognitive Radio System
  • A Spectrum Handover Method and Device Based on Cognitive Radio System
  • A Spectrum Handover Method and Device Based on Cognitive Radio System

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Embodiment 1

[0037] Embodiment 1 of the present invention provides a spectrum switching method based on a cognitive radio system. The application scenarios of the method include but are not limited to: LTE (Long Term Evolution, long-term evolution) using CR technology, TD-SCDMA (TimeDivision-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access, also known as Code Division Multiple Access)-2000 and other wireless communication systems; such as figure 2 As shown, the method includes the following steps:

[0038] Step 201 , before spectrum switching, base station equipment (base station equipment in the CR system) and terminal equipment (terminal equipment in the CR system) maintain uplink synchronization on the source operating frequency point.

[0039] In a preferred implementation of the embodiment of the present invent...

Embodiment 2

[0062] Embodiment 2 of the present invention provides a spectrum switching method based on a cognitive radio system to describe the processing of base station equipment in detail; image 3 As shown, the method includes the following steps:

[0063] Step 301 , before spectrum switching, the base station device (the base station device in the CR system) maintains uplink synchronization with the terminal device (the terminal device in the CR system) at the source operating frequency point.

[0064] In a preferred implementation of the embodiment of the present invention, the base station device determines whether the terminal device maintains uplink synchronization with the base station device at the source operating frequency point by detecting the uplink signal sent by the terminal device; if there is a synchronization deviation, the base station device sends the terminal device The device sends a timing adjustment command to instruct the terminal device to adjust the uplink ti...

Embodiment 3

[0078] Embodiment 3 of the present invention provides a spectrum switching method based on a cognitive radio system to describe in detail the processing of terminal equipment; Figure 4 As shown, the method includes the following steps:

[0079] Step 401 , before spectrum switching, the terminal equipment (the terminal equipment in the CR system) maintains uplink synchronization with the base station equipment (the base station equipment in the CR system) at the source operating frequency point.

[0080] In a preferred implementation of the embodiment of the present invention, the terminal device detects the timing adjustment command issued by the base station device, and adjusts the uplink timing synchronization point according to the timing adjustment command, that is, adjusts the uplink channel / signal in the uplink transmission of the terminal device Timing synchronization to ensure that the terminal equipment maintains uplink synchronization with the base station equipment...

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Abstract

Disclosed are a spectrum handoff method and equipment based on a cognitive radio system. The method includes: base station equipment sending a spectrum handoff command to terminal equipment on a source operating frequency point; the base station equipment actively allocating an uplink resource to the terminal equipment on a target operating frequency point; and the terminal equipment utilizing an uplink synchronization parameter which is used before spectrum handoff to send a spectrum handoff completion message to the base station equipment using the uplink resource on the target operating frequency point.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a spectrum switching method and equipment based on a cognitive radio system. Background technique [0002] Radio communication spectrum is a precious natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the shortage of spectrum resources, relevant departments and institutions have carried out monitoring and research on wireless communication spectrum. It is found that some frequency bands (such as TV frequency bands) are not used most of the time or in most regions, while some frequency bands have multi-system and multi-user competition at the same time, that is, the use of spectrum resources is inconsistent. Equilibrium phenomenon. [0003] It is against this background that the concept of CR (Cognitive Radio, Cognitive Radio) came into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/06H04W56/00H04W72/04
CPCH04W36/0055H04W56/0015
Inventor 白文岭彭莹李媛媛蒋成钢杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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