[특허]Obtaining improved frequency reuse in wireless communication systems

Obtaining improved frequency reuse in wireless communication systems 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/36
출원번호	US-0331455 (1994-10-31)
발명자 / 주소	Doner John R. (Sebastian FL)
출원인 / 주소	AirNet Communications Corporation (Melbourne FL 02)
인용정보	피인용 횟수 : 99 인용 특허 : 0

초록 ▼

A technique for allocating frequencies in a cellular communication system. The frequency reuse plan divides all available frequencies into six groups with the frequencies assigned in an ascending index order modulo 6. A three cell reuse plan is implemented with six 60°sectorized antennas per cell, and two frequency groups being assigned for use in each cell. The channel groups are allocated to the sectors such that no two adjacent sectors use the same frequency groups. As a result, an effective times one frequency reuse plan is implemented. A frequency assignment process which attempts to avoid assigning the same frequency to a mobile which is located in the outer portion of a sector which is also in use in potential interfering outer sectors of homologous cells insures that carrier to interference (C/I) ratio minimums can be met without specialized encoding techniques.

대표청구항 ▼

A cellular communication system consisting of a plurality of cells, the plurality of cells being located substantially adjacent to one another, with each cell containing a plurality of antennas centrally located in the cell and radiating into sixty-degree (60°) sectors of the cell, to thereby provide six sectors per cell, the system comprising: means for grouping available frequencies into at least six groups, with the assignment of frequencies to frequency groups being exclusive such that any one available frequency is only assigned to one group; means for providing uniform reuse of the at least six frequency groups in the cells by selecting two and only two frequency groups of the at least six frequency groups to be used in at least one of the cells so that only two frequency groups are used in any given cell, to thereby form sets of homologous cells having the same two frequency groups assigned thereto; means for assigning the two frequency groups in at least one of the homologous cells to alternate sectors in each cell, such that no two adjacent sectors in the same cell are assigned the same one of the two frequency groups, and such that all frequencies of a group are used in one of the alternating sectors; and means for determining when a mobile unit in one of the sectors is requesting access to the system and if so, whether the mobile unit is located in an inner portion or outer portion of the sector; and means for assigning a frequency to the mobile unit from the frequency group assigned to the sector depending upon whether the mobile unit is located in the inner or the outer portion of the sector.

이 특허를 인용한 특허 (99)

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Donner,Irah H., System and method for determining and/or transmitting and/or establishing communication with a mobile device user for providing, for example, concessions, tournaments, competitions, matching, reallocating, upgrading, selling tickets, other event admittance means, goods and/or services.
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Obtaining improved frequency reuse in wireless communication systems 원문보기

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Obtaining improved frequency reuse in wireless communication systems 원문보기

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