Cellular channel allocation scheme with multi-user detection
First Claim
1. A method of channel allocation in a cellular communications system, including the steps of:
- a. allocating a common channel to a plurality of user terminals within a cluster of n adjacent cells, without allocating said common channel to user terminals in other cells adjacent to said cluster, wherein each cell of a group of three cells within said cluster is adjacent to each other cell of said group of three cells;
b. receiving a respective plurality of temporally overlapping transmissions within said common channel from said plurality of user terminals in the same cell or adjacent cells within the cluster; and
c. separately decoding each of said plurality of overlapping transmissions by means of a multi-user detection technique,wherein said common channel comprises a plurality of m timeslots within a bearer, and in each of said m time slots, up to n user signals for n cells are transmitted, such that said common channel supports up to n*m transmissions.
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Accused Products
Abstract
In a spectrum allocation method in a cellular communication system, a cell pattern is divided into clusters each containing a plurality of adjacent cells. A pool of forward and return link bearers is allocated to each cluster and may be shared among cells within the cluster. Bearers are reused between blusters having a sufficiently high mutual isolation. Preferably, the same time slot in a return link bearer is allocated to multiple users within the cluster. The receiver of the shared return link bearer uses multi-user detection techniques to separately decode the signals from each user sharing a time slot, using the spatial diversity of the individual cells.
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Citations
35 Claims
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1. A method of channel allocation in a cellular communications system, including the steps of:
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a. allocating a common channel to a plurality of user terminals within a cluster of n adjacent cells, without allocating said common channel to user terminals in other cells adjacent to said cluster, wherein each cell of a group of three cells within said cluster is adjacent to each other cell of said group of three cells; b. receiving a respective plurality of temporally overlapping transmissions within said common channel from said plurality of user terminals in the same cell or adjacent cells within the cluster; and c. separately decoding each of said plurality of overlapping transmissions by means of a multi-user detection technique, wherein said common channel comprises a plurality of m timeslots within a bearer, and in each of said m time slots, up to n user signals for n cells are transmitted, such that said common channel supports up to n*m transmissions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 17, 18, 22, 23, 24, 25, 26, 27, 28)
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9. A method of channel allocation in a cellular communications system, including the steps of:
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a. determining a cell clustering pattern in which cells are grouped together into a plurality of clusters of n adjacent cells, each cluster containing a similar number and arrangement of adjacent cells, wherein each cell of a group of three cells within a cluster is adjacent to each other cell of said group of three cells; b. allocating a plurality of channels to said clusters such that each said channel is allocated only to non-adjacent clusters; and c. allocating the same one of said channels to each of a plurality of user terminals within the same or adjacent cells of the same cluster such that each of said plurality of user terminals is permitted to transmit at overlapping times within the same channel, wherein the same one of said channels comprises a plurality of m timeslots within a bearer, and in each of said m time slots, up to n user signals for n cells are transmitted, such that said channel supports up to n*m transmissions. - View Dependent Claims (10, 11, 12, 13, 14, 15, 19, 20, 21)
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29. A method of channel allocation in a cellular communications system, including the steps of:
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a. allocating a common channel to a plurality of user terminals within a cluster of n adjacent cells, without allocating said common channel to user terminals in other cells adjacent to said cluster, wherein each cell within said cluster is adjacent to each other cell of said cluster; b. receiving a respective plurality of temporally overlapping transmissions within said common channel from said plurality of user terminals in the same cell or adjacent cells within the cluster; and c. separately decoding each of said plurality of overlapping transmissions by means of a multi-user detection technique, wherein said common channel comprises a plurality of m timeslots within a bearer, and in each of said m time slots, up to n user signals for n cells are transmitted, such that said common channel supports up to n*m transmissions. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification