Method and apparatus for assigning radio channels in mobile communications systems
First Claim
1. A method of assigning radio channels between mobile stations and base stations in a mobile communication system, the radio channels being assignable as resources shared by all of the mobile stations, comprising the steps of:
- i) determining respective correspondences between quantized distances between the mobile stations and the base stations and the radio channels in said communication system;
ii) determining a distance between one of said mobile stations and a base station between which a radio channel is to be assigned;
iii) selecting a candidate channel for the radio channel to be assigned, using the distance determined in step ii) in accordance with the correspondence determined in step i);
iv) testing whether an assignment condition is satisfied such that the candidate channel for the radio channel to be assigned is not in use in the base station and satisfies a predetermined reception condition;
v) changing the candidate channel in accordance with a predetermined order if the assignment condition in step iv) is not satisfied;
vi) repeating the steps iv) and v) until the assignment condition is satisfied or all of the radio channels are tested; and
vii) assigning the candidate radio channel that first satisfies the assignment condition in step iv) between the mobile station and the base station.
1 Assignment
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Accused Products
Abstract
There is provided a method and an apparatus for assigning a radio channel between base and mobile stations in a mobile communication system, which provide advantages of first available and reuse partitioning systems and do not cause as great a proportional increase in a processing amount as an ARP system. A radio zone is divided into a number of regions having the same area which is equal to channel number N, usable in an entire system by concentric circles centering on a base station 12. Channels 1 to Ns are allotted to the respective regions. Upon the issuance of a channel assignment request, a channel corresponding to the region where the mobile station is located or its neighboring channels is assigned preferentially.
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Citations
17 Claims
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1. A method of assigning radio channels between mobile stations and base stations in a mobile communication system, the radio channels being assignable as resources shared by all of the mobile stations, comprising the steps of:
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i) determining respective correspondences between quantized distances between the mobile stations and the base stations and the radio channels in said communication system; ii) determining a distance between one of said mobile stations and a base station between which a radio channel is to be assigned; iii) selecting a candidate channel for the radio channel to be assigned, using the distance determined in step ii) in accordance with the correspondence determined in step i); iv) testing whether an assignment condition is satisfied such that the candidate channel for the radio channel to be assigned is not in use in the base station and satisfies a predetermined reception condition; v) changing the candidate channel in accordance with a predetermined order if the assignment condition in step iv) is not satisfied; vi) repeating the steps iv) and v) until the assignment condition is satisfied or all of the radio channels are tested; and vii) assigning the candidate radio channel that first satisfies the assignment condition in step iv) between the mobile station and the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for assigning radio channels between a plurality of mobile stations and a plurality of base stations in a mobile communication system, the radio channels being assignable as resources shared by all of the mobile stations, comprising:
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means for storing data of correspondence between quantized distances between the mobile stations and the base stations and the radio channels in said communication system; means for determining a distance between one of said mobile stations and a base station between which a radio channel is to be assigned; means for determining a candidate channel for the radio channel to be assigned, using the distance determined by the means for determining the distance in accordance with the correspondence stored in the means for storing; and means for retrieving the candidate radio channel from said data, wherein said candidate radio channel is not in use in the base station and satisfies a predetermined reception condition, starting from the candidate determined by the candidate determining means, in accordance with a predetermined order. - View Dependent Claims (14, 15, 16, 17)
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Specification