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Handover method of user equipment, base station, user equipment and handover system

A technology of user equipment and base station, which is applied in the field of communication and can solve problems such as inability to receive uplink messages

Active Publication Date: 2017-06-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when accessing the blank frequency band of the TV service, when the TV signal appears in the adjacent frequency, the Federal Communications Commission (Federal Communications Commission, FCC) stipulates that the transmission power of the base station can remain unchanged, but the maximum transmission power of the user equipment It needs to drop from 20dBm to 16dBm, so that the base station cannot receive the uplink messages sent by some user equipments

Method used

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  • Handover method of user equipment, base station, user equipment and handover system
  • Handover method of user equipment, base station, user equipment and handover system
  • Handover method of user equipment, base station, user equipment and handover system

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Embodiment 1

[0094] An embodiment of the present invention provides a handover method of a user equipment, which is applied to a base station of a mobile communication system, and the mobile communication system may be any cellular mobile communication system, such as LTE (Long Term Evolution, long-term evolution technology), GSM ( Global System of Mobile communications, Global System for Mobile Communications), UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System), etc. Such as figure 1 As shown, the method includes:

[0095] 101. After learning that adjacent channel interference exists, the base station sends a first downlink message to the user equipment within the coverage of the base station, where the first downlink message is used to indicate the user equipment within the coverage of the base station. The user equipment reduces the transmission power.

[0096] Among them, the adjacent channel interference refers to the adjacent channel interfere...

Embodiment 2

[0134] Such as Figure 5 As shown, the embodiment of the present invention also provides a user equipment handover method, the method includes:

[0135] 501. After the base station learns that adjacent frequency interference exists, the base station sends a frequency point application message to a spectrum management entity or a database.

[0136] Among them, the adjacent channel interference refers to the adjacent channel interference caused when there is a channel adjacent to the working channel of this cell in the adjacent cell and a signal appears in the adjacent channel. The base station knows the presence of adjacent-channel interference through its own perception and measurement, or receives information about adjacent-channel interference sensed and measured by other devices, or the database notifies the base station before the occurrence of adjacent-channel interference.

[0137] For an LTE system, the base station may specifically be an eNB. If the eNB base station l...

Embodiment 3

[0186] Such as Figure 7 As shown, the embodiment of the present invention also provides a base station 70. The base station 70 is applied to a mobile communication system. The mobile communication system may be LTE. The base station 70 includes: a sending unit 71, a receiving unit 72, and a first determining unit 73 , and switching unit 74 and judging unit 75 .

[0187] The sending unit 71 is configured to send a frequency point application message to a spectrum management entity or a database after the base station 70 learns that there is adjacent frequency interference.

[0188] Among them, the adjacent channel interference refers to the adjacent channel interference caused when there is a channel adjacent to the working channel of this cell in the adjacent cell and a signal appears in the adjacent channel. The base station 70 learns the presence of adjacent-channel interference through its own perception and measurement, or receives information about adjacent-channel inte...

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Abstract

Disclosed are a handover method for a user equipment, a base station, the user equipment, and a handover system, allowing for real-time handover of a user equipment having limited uplink signal power to ensure normal communication for the user equipment. The specific solution is such that: when the base station learns the presence of an adjacent channel interference, the base station transmits a first downlink message to the user equipment within the coverage of the base station, where the first downlink message is used for instructing the user equipment within the coverage of the base station to reduce transmission power; the base station receives a signal transmitted by a first user equipment after the transmission power is reduced on the basis of the first downlink message; the base station determines a second user equipment on the basis of known user equipment within the coverage of the base station and of the first user equipment, where the second user equipment refers to a user equipment that is within the coverage of the base station and is limited in uplink signal power; and the base station hands over the second user equipment. Embodiments of the present invention are applicable in the technical field of communications.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a handover method of user equipment, a base station, user equipment and a handover system. Background technique [0002] At present, the frequency spectrum is allocated fixedly. The TV service uses the frequency spectrum with good propagation characteristics and great coverage advantages of hundreds of megabits below 800MHz, but there are a large number of underused frequency bands in this frequency spectrum. In order to better improve spectrum utilization, existing mobile communication systems use cognitive radio technology to sense the wireless communication environment, dynamically detect and effectively access idle radio frequency bands, such as access to blank frequency bands that are fixedly assigned to TV services . [0003] However, when accessing the blank frequency band of the TV service, when the TV signal appears in the adjacent frequency, the Federal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/30H04W52/24
CPCH04W36/20Y02D30/70
Inventor 郭锐龚磊
Owner HUAWEI TECH CO LTD