[특허]Intra-cell call hand-over in radio communication systems with dynamic channel allocation

Intra-cell call hand-over in radio communication systems with dynamic channel allocation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/00 H04Q-009/02 H04B-015/02
출원번호	US-0710866 (1991-06-06)
우선권정보	CA-2032325 (1990-12-14)
발명자 / 주소	Strawczynski Leo (Ottawa CAX) Sandler Howard M. (Ottawa CAX) Plett Gregory L. (North Gower CAX) Steer David G. (Nepean CAX)
출원인 / 주소	Northern Telecom Limited (Montreal CAX 03)
인용정보	피인용 횟수 : 79 인용 특허 : 0

초록 ▼

The intra-cell call hand-over technique of this invention is characterized by the use of channel information from both base station and subscriber terminal in determining a standby radio traffic channel upon which to hand over a call. Communication between the base station and subscriber terminal is carried out on an inband or associated signalling channel for the selection of the standby traffic channel. The standby radio channel is the channel, which, of a set of channels under consideration by the subscriber terminal, contains the least amount of interference as measured at the subscriber terminal. The set of channels under consideration by the subscriber terminal is a subset of the entire set of channels allocated to the service. This subset is comprised of those channels having little interference as measured by the base station. The call hand-over technique thereby assures that calls proceed on channels containing little interference from the viewpoints of both base station and subscriber terminal.

대표청구항 ▼

A method of completing an intra-cell call hand-over from a current traffic channel used between a base station and a subscriber terminal to a standby traffic channel, comprising the steps of: selecting, from a plurality of traffic channels available for service, a first group of standby traffic channels determined to be useable at the base station; sending a message, to the subscriber terminal, along an inband signalling channel linking the base station and the subscriber terminal, the message being indicative of the standby traffic channels in said first group which are determined to be useable at the base station; receiving the message at the subscriber terminal; selecting, from said first group of standby traffic channels indicated in the message, a second group of standby traffic channels determined to be useable at the subscriber terminal; forwarding a response message, to the base station, along the inband signalling channel, the response message being indicative of the standby traffic channels of said second group which were determined to be useable at the subscriber terminal; monitoring the interference level on a current traffic channel; sending a request for a new traffic channel if the interference level on the current traffic channel changes to an unacceptable level; and switching the base station and the subscriber terminal to one of the standby traffic channels selected from said second group of traffic channels.

이 특허를 인용한 특허 (79)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
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연합인증

Intra-cell call hand-over in radio communication systems with dynamic channel allocation 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Intra-cell call hand-over in radio communication systems with dynamic channel allocation 원문보기

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