Random access method and equipment in cognitive radio system

A cognitive radio and random access technology, which is applied in the field of communication, can solve problems such as the inability to distinguish between users of different service levels, long service interruption time, and high frequency spectrum switching failure probability, so as to reduce the failure probability and service interruption time, Reduce the failure probability and delay, and reduce the effect of business interruption time

Active Publication Date: 2013-06-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the spectrum handover process of the CR system, there is no reasonable random access conflict solution in the prior art, resulting in a high probability of spectrum handover failure and a long service interruption time, and it cannot be performed for users of different service levels. Distinguished processing affects the user experience of the CR system

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  • Random access method and equipment in cognitive radio system
  • Random access method and equipment in cognitive radio system
  • Random access method and equipment in cognitive radio system

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Embodiment 1

[0029] Embodiment 1 of the present invention provides a random access method in a cognitive radio system, aiming at a random access process initiated during a spectrum switching process. The random access method can be at least applicable to LTE (Long Term Evolution, long-term evolution), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division-Synchronous Code Division Multiple Access), HSPA (High- Speed ​​Packet Access, high-speed link packet access), CDMA (Code Division Multiple Access, code division multiple access)-2000, WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access), GSM (global system for mobile communications, Global System for Mobile Communications) and other mobile communication systems.

[0030] Such as figure 2 As shown, the random access method in the cognitive radio system includes the following steps:

[0031] Step 201, the base station device (the base station device is a base station device bas...

Embodiment 2

[0058] Based on the same inventive concept as the above method, an embodiment of the present invention also provides a base station device, such as image 3 As shown, the equipment includes:

[0059] A generating module 11, configured to generate a spectrum switching command, where the spectrum switching command includes random access fallback time parameter information;

[0060] The sending module 12 is configured to send the spectrum switching command to the user equipment in the cell, instructing the user equipment to use the random access back-off time parameter information to initiate a random access process during the spectrum switching process.

[0061] The random access back-off time parameter information includes: a random access maximum delay factor applicable to all user equipments in the cell; or,

[0062] A random access delay factor sequence for different service levels of user equipment in the cell; the random access delay factor sequence is T 1 ,T 2 ,T i-1 ...

Embodiment 3

[0067] Based on the same inventive concept as the above method, an embodiment of the present invention also provides a user equipment, such as Figure 4 As shown, the equipment includes:

[0068] The receiving module 21 is configured to receive a spectrum switching command from a base station device, where the spectrum switching command includes random access fallback time parameter information;

[0069] The processing module 22 is configured to use the random access back-off time parameter information to initiate a random access process during the spectrum switching process.

[0070] The processing module 22 is specifically configured to determine a random access backoff time by using the random access backoff time parameter information, and initiate a random access process after waiting for the random access backoff time.

[0071]The processing module 22 is further configured to perform downlink synchronization with the target operating frequency point after receiving the s...

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Abstract

The invention discloses a random access method and equipment in a cognitive radio system. The random access method comprises that base station equipment generates a frequency spectrum switch command, the frequency spectrum switch command comprises random access backspacing time parameter information, and the base station equipment sends the frequency spectrum switch command to user equipment in a community to instruct the user equipment to use the random access backspacing time parameter information to initiate a random access process in a frequency spectrum switch process. According to the random access method, due to the fact that the random access backspacing time parameter information is carried in the frequency spectrum switch command, the conflict of random access is inhibited in the frequency spectrum switch process of a CR system, a large amount of user equipment (UE) which intensively conducts random access on a target work frequency point is dispersed in time in advance, the failure probability and delay of random access on the target work frequency point in the frequency spectrum switch process are lowered, and further more, the failure probability frequency spectrum switch and service break period are lowered, and the user experience of the CR system is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a random access method and device in a cognitive radio system. Background technique [0002] 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 current situation of spectrum resources shortage, the current wireless communication spectrum is monitored and studied, and it is found that some frequency bands (such as TV bands) are in most time It is not used or is not used in most regions, and it is found that some frequency bands have multiple systems and multiple users competing at the same time, that is, there is an imbalance in the use of spectrum resources. CR (Cognitive Radio, Cognitive Radio) technology was born under this background, and its basic idea is: on the premise of not causing interference to the authorized system, by monitoring the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W36/0055H04W36/0077H04W36/06H04W74/008H04W74/085H04B2201/692H04W36/04H04W74/0833
Inventor 白文岭高卓蒋成钢李媛媛杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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